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Message boards : Number crunching : How many GPU'S

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Profile Lonnie ChristensenProject donor
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2014 Tour de Primes most Mountain Stage primes321 LLR Gold: Earned 500,000 credits (923,212)ESP LLR Silver: Earned 100,000 credits (225,610)PPS LLR Ruby: Earned 2,000,000 credits (3,765,928)PSP LLR Silver: Earned 100,000 credits (147,838)SGS LLR Gold: Earned 500,000 credits (527,678)TRP LLR Silver: Earned 100,000 credits (427,395)Woodall LLR Amethyst: Earned 1,000,000 credits (1,268,566)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,541,412)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,268,655,676)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (9,056,237)GFN Ruby: Earned 2,000,000 credits (4,208,780)
Message 84577 - Posted: 3 Apr 2015 | 17:14:05 UTC

I'm wondering if I can run multiple GPU'S of different models?
Like Nvidia GTX Titan black and EVGA GeForce GTX780 Ti.
Thanks Lonnie

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Discovered 1 mega primeFound 3 primes in the 2018 Tour de Primes321 LLR Amethyst: Earned 1,000,000 credits (1,374,650)Cullen LLR Amethyst: Earned 1,000,000 credits (1,512,653)ESP LLR Gold: Earned 500,000 credits (710,747)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,205,397)PPS LLR Ruby: Earned 2,000,000 credits (2,305,618)PSP LLR Ruby: Earned 2,000,000 credits (2,113,325)SoB LLR Ruby: Earned 2,000,000 credits (2,921,805)SR5 LLR Amethyst: Earned 1,000,000 credits (1,226,858)SGS LLR Gold: Earned 500,000 credits (632,629)TRP LLR Turquoise: Earned 5,000,000 credits (5,315,636)Woodall LLR Silver: Earned 100,000 credits (127,395)321 Sieve Bronze: Earned 10,000 credits (88,433)Generalized Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,626,395)PPS Sieve Double Bronze: Earned 100,000,000 credits (135,099,567)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (555,042)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,089,296)AP 26/27 Turquoise: Earned 5,000,000 credits (6,347,510)GFN Double Silver: Earned 200,000,000 credits (225,822,647)
Message 84584 - Posted: 3 Apr 2015 | 22:19:26 UTC - in response to Message 84577.

I'm wondering if I can run multiple GPU'S of different models?
Like Nvidia GTX Titan black and EVGA GeForce GTX780 Ti.
Thanks Lonnie

I believe you can. I did this recently with two EVGA Kepler cards - GTX TITAN and a GTX TITAN Black Superclocked in the primary PCI-E x16 slot. The only hiccup was that BOINC showed this machine as having two TITAN Black SCs, rather than two slightly different models.

These cards are processing tasks as specified in my PrimeGrid preferences. I don't know of a way to specify different subprojects for each card, which isn't a problem for me.

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321 LLR Ruby: Earned 2,000,000 credits (2,050,518)Cullen LLR Ruby: Earned 2,000,000 credits (2,282,176)ESP LLR Ruby: Earned 2,000,000 credits (3,106,610)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,142,891)PPS LLR Ruby: Earned 2,000,000 credits (4,738,856)PSP LLR Ruby: Earned 2,000,000 credits (3,475,366)SoB LLR Double Bronze: Earned 100,000,000 credits (177,434,766)SR5 LLR Ruby: Earned 2,000,000 credits (3,027,344)SGS LLR Turquoise: Earned 5,000,000 credits (5,042,519)TRP LLR Ruby: Earned 2,000,000 credits (2,010,534)Woodall LLR Ruby: Earned 2,000,000 credits (2,077,196)321 Sieve Ruby: Earned 2,000,000 credits (2,483,203)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (28,991,973)PPS Sieve Double Turquoise: Earned 5,000,000,000 credits (5,970,330,906)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Sapphire: Earned 20,000,000 credits (24,236,704)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,007,588)AP 26/27 Jade: Earned 10,000,000 credits (10,058,984)GFN Jade: Earned 10,000,000 credits (15,782,029)PSA Gold: Earned 500,000 credits (525,865)
Message 84585 - Posted: 3 Apr 2015 | 22:38:36 UTC - in response to Message 84584.
Last modified: 3 Apr 2015 | 22:40:21 UTC

Yes i have a mixture of brands and models in my machines

780TI, 780s, 770, 750TI, 650TIs, zotac, evga, asus

various combinations, 2-4 GPUs

And yes it reports them all as being one type. So BOINC might report that you have two Titans or two 780Tis but it will run just fine. This skews the Fastest GPU pages results some.

I also had space to stick 430s in the PCI1 slots in one machine but couldnt get that to work. I had read that that should work but no go.
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Discovered the World's First base 25 Generalized Cullen prime!!!Discovered 12 mega primesEliminated 2 conjecture "k"sDiscovered 2 AP26sDiscovered 1 twin prime2017 Tour de Primes highest prime count2017 Tour de Primes most Mountain Stage primes2018 Tour de Primes most Mountain Stage primesFound 4 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 4 primes in the 2018 Tour de Primes Mountain StageFound 1 mega prime in the 2018 Tour de Primes Mountain StageFound 1 prime in the 2019 Tour de PrimesFound 1 mega prime in the 2019 Tour de PrimesFound 3 primes in the 2020 Tour de PrimesFound 2 mega primes in the 2020 Tour de Primes321 LLR Emerald: Earned 50,000,000 credits (65,196,413)Cullen LLR Emerald: Earned 50,000,000 credits (60,367,263)ESP LLR Emerald: Earned 50,000,000 credits (60,398,721)Generalized Cullen/Woodall LLR Double Bronze: Earned 100,000,000 credits (100,245,667)PPS LLR Double Silver: Earned 200,000,000 credits (210,459,044)PSP LLR Emerald: Earned 50,000,000 credits (62,008,047)SoB LLR Double Silver: Earned 200,000,000 credits (235,646,581)SR5 LLR Emerald: Earned 50,000,000 credits (84,718,844)SGS LLR Emerald: Earned 50,000,000 credits (61,813,198)TRP LLR Double Bronze: Earned 100,000,000 credits (127,052,853)Woodall LLR Emerald: Earned 50,000,000 credits (65,610,903)321 Sieve Double Bronze: Earned 100,000,000 credits (104,036,369)Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,879,764)Generalized Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (100,428,955)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (4,225,454,733)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Double Bronze: Earned 100,000,000 credits (101,857,516)TRP Sieve (suspended) Emerald: Earned 50,000,000 credits (50,936,081)AP 26/27 Double Amethyst: Earned 1,000,000,000 credits (1,614,305,212)GFN Double Turquoise: Earned 5,000,000,000 credits (5,380,186,401)PSA Double Turquoise: Earned 5,000,000,000 credits (6,051,232,610)
Message 84586 - Posted: 3 Apr 2015 | 22:43:41 UTC - in response to Message 84584.
Last modified: 3 Apr 2015 | 22:44:11 UTC

I'm wondering if I can run multiple GPU'S of different models?
Like Nvidia GTX Titan black and EVGA GeForce GTX780 Ti.
Thanks Lonnie

I believe you can. I did this recently with two EVGA Kepler cards - GTX TITAN and a GTX TITAN Black Superclocked in the primary PCI-E x16 slot. The only hiccup was that BOINC showed this machine as having two TITAN Black SCs, rather than two slightly different models.


BOINC does that. I had it happen with a GTX480 and a GTX580 -- looked like I had two 480s, one incredibly fast. I don't know if it does that all the time. Doesn't cause any problems.

If cards are very different in capabilities, you might need to set use_all_gpus in a cc_config, but I would guess that will not be a problem with those two cards.

Of course, power and cooling could be issues, but presumably you have thought of that.
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321 LLR Amethyst: Earned 1,000,000 credits (1,446,317)Cullen LLR Ruby: Earned 2,000,000 credits (2,100,744)ESP LLR Ruby: Earned 2,000,000 credits (3,638,182)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,159,526)PPS LLR Amethyst: Earned 1,000,000 credits (1,307,875)PSP LLR Jade: Earned 10,000,000 credits (10,408,711)SoB LLR Sapphire: Earned 20,000,000 credits (22,944,219)SR5 LLR Ruby: Earned 2,000,000 credits (2,014,726)SGS LLR Amethyst: Earned 1,000,000 credits (1,085,939)TRP LLR Turquoise: Earned 5,000,000 credits (5,630,136)Woodall LLR Ruby: Earned 2,000,000 credits (2,035,102)321 Sieve Ruby: Earned 2,000,000 credits (2,146,795)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,190,376)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,651,496)PPS Sieve Double Silver: Earned 200,000,000 credits (215,160,596)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (3,591,642)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,819,072)AP 26/27 Ruby: Earned 2,000,000 credits (2,150,876)GFN Sapphire: Earned 20,000,000 credits (22,745,636)PSA Sapphire: Earned 20,000,000 credits (38,445,145)
Message 84590 - Posted: 4 Apr 2015 | 0:42:37 UTC
Last modified: 4 Apr 2015 | 1:07:54 UTC

With trying to cram as many GPUs as you can into a system, it can also have to do with the maximum amount of PCI-e lanes available to your chipset/processor, and how those lanes can be divided. You could google for your chipset or CPU and its available configurations with different chipsets - this will probably tell you what will and won't work, i.e. 1x16 and 2x8 might be fine, but 3x[whatever] isn't supported; or because of one or all of the card's/cards' demands, the selection of "divides" which your chipset and CPU support doesn't correlate to what your cards are asking.

So you might be safe if you've forked out for a mobo with a configuration which is certified for 4x SLI/Crossfire because of the sheer number of lane-dividing configurations it supports: but if you've got one which is certified to "only" support 3x SLI/Crossfire, that doesn't mean it will take 3 different (or even two different) modern graphics cards, even if you have the power and PCI-e slots (and on paper, the software) to accommodate them.

For example, here is how a Z97 Haswell/Broadwell system can adapt:




-

...And here's how an X99 Xeon system can adapt:

-



Obviously I'm talking about the top-left bit. So, with an ultra-expensive Xeon setup at home, this could be an untapped goldmine for the use of old(er) GPUs. It's quite a rare scenario though, I suppose.

The Z97 diagram is a bit misleading because loads of us have got DDR3 clocked over 1600MHz, and in the future (possibly now, actually) the X99 diagram could be a bit redundant because of course available DDR4 modules will increase in speed (and hopefully the chipset/Xeon/BIOS won't complain - more of a concern considering it's aimed at the workplace, not power-users). The Quad-channel nature of the Xeon is obviously a huge advantage for crunching here, no matter what speed the DDR4 is. Also - I don't think DDR4 is currently faster "by nature", either - it's just physically denser and more power-efficient.

Profile Lonnie ChristensenProject donor
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2014 Tour de Primes most Mountain Stage primes321 LLR Gold: Earned 500,000 credits (923,212)ESP LLR Silver: Earned 100,000 credits (225,610)PPS LLR Ruby: Earned 2,000,000 credits (3,765,928)PSP LLR Silver: Earned 100,000 credits (147,838)SGS LLR Gold: Earned 500,000 credits (527,678)TRP LLR Silver: Earned 100,000 credits (427,395)Woodall LLR Amethyst: Earned 1,000,000 credits (1,268,566)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,541,412)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,268,655,676)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (9,056,237)GFN Ruby: Earned 2,000,000 credits (4,208,780)
Message 84695 - Posted: 8 Apr 2015 | 16:32:16 UTC

Thanks everyone for the info, second question is what would be the best OS? I do want to use a Windows system, this computer is a MB with two CPU's.....and seven video cards....
It is for Prime Grid Only.....can't afford to run it all the time with a 1000 watt PS>
My MB is a Evga 270-se-w888 w/7 slots.....

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2014 Tour de Primes most Mountain Stage primes321 LLR Gold: Earned 500,000 credits (923,212)ESP LLR Silver: Earned 100,000 credits (225,610)PPS LLR Ruby: Earned 2,000,000 credits (3,765,928)PSP LLR Silver: Earned 100,000 credits (147,838)SGS LLR Gold: Earned 500,000 credits (527,678)TRP LLR Silver: Earned 100,000 credits (427,395)Woodall LLR Amethyst: Earned 1,000,000 credits (1,268,566)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,541,412)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,268,655,676)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (9,056,237)GFN Ruby: Earned 2,000,000 credits (4,208,780)
Message 84851 - Posted: 14 Apr 2015 | 16:26:30 UTC

Can anyone tell me what this is?
'
Lonnie

mailbox:///C:/Users/Lonnie%20Christensen/AppData/Roaming/Mozilla/SeaMonkey/Profiles/hr5orudz.default/Mail/mail.wavecable-1.com/Inbox?number=3453307&part=1.2&type=image/jpeg&filename=IMG_0486.JPG


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Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,671,514)Cullen LLR Turquoise: Earned 5,000,000 credits (5,031,868)ESP LLR Turquoise: Earned 5,000,000 credits (5,064,082)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,038,750)PPS LLR Ruby: Earned 2,000,000 credits (4,801,151)PSP LLR Turquoise: Earned 5,000,000 credits (7,639,762)SoB LLR Sapphire: Earned 20,000,000 credits (42,540,184)SR5 LLR Jade: Earned 10,000,000 credits (11,510,340)SGS LLR Ruby: Earned 2,000,000 credits (2,069,865)TRP LLR Ruby: Earned 2,000,000 credits (2,150,717)Woodall LLR Turquoise: Earned 5,000,000 credits (5,046,412)321 Sieve Turquoise: Earned 5,000,000 credits (8,077,317)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,002,919)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,005,451)PPS Sieve Emerald: Earned 50,000,000 credits (52,015,997)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,341,676)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,070,804)AP 26/27 Jade: Earned 10,000,000 credits (10,742,251)GFN Sapphire: Earned 20,000,000 credits (48,438,681)PSA Double Gold: Earned 500,000,000 credits (720,965,233)
Message 84853 - Posted: 14 Apr 2015 | 17:28:30 UTC - in response to Message 84851.

Can anyone tell me what this is?
'
Lonnie

mailbox:///C:/Users/Lonnie%20Christensen/AppData/Roaming/Mozilla/SeaMonkey/Profiles/hr5orudz.default/Mail/mail.wavecable-1.com/Inbox?number=3453307&part=1.2&type=image/jpeg&filename=IMG_0486.JPG




You're trying to link us to something that exists on your C: drive. Sorry, but we're not able to see that.

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Discovered 2 mega primesFound 1 prime in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (803,631)Cullen LLR Gold: Earned 500,000 credits (620,013)ESP LLR Gold: Earned 500,000 credits (728,572)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (585,120)PPS LLR Turquoise: Earned 5,000,000 credits (6,845,262)PSP LLR Gold: Earned 500,000 credits (506,876)SoB LLR Silver: Earned 100,000 credits (379,643)SR5 LLR Ruby: Earned 2,000,000 credits (4,783,071)SGS LLR Amethyst: Earned 1,000,000 credits (1,006,021)TRP LLR Ruby: Earned 2,000,000 credits (2,403,013)Woodall LLR Gold: Earned 500,000 credits (509,918)321 Sieve Ruby: Earned 2,000,000 credits (2,035,186)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,122,369)PPS Sieve Double Gold: Earned 500,000,000 credits (758,906,488)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,058,245)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (3,185,685)AP 26/27 Turquoise: Earned 5,000,000 credits (9,901,307)GFN Double Gold: Earned 500,000,000 credits (592,432,913)
Message 84883 - Posted: 16 Apr 2015 | 12:01:19 UTC

I'm currently building a 3 GPU system on a z97 Asus Pro (wifi). Linux or Win 8.1 - the motherboard has yet to detect any of the GPU's (GTX970/GTX750/GT630) for the OS.

Linux on a USB (never went past POST) for the option to install. Switched over to Win8.1 installation and all went well expect the MB can't detect GPU"S in UFEI mode or not.

Any ideas?

A side note: Haswell's "rated" TDP is never anywhere the supposed number. A 65W TDP Haswell draws 89 watts on four cores - 63W for 3 - 45W for 2. Never run a stock cooler fan while computing LLR!

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Discovered 1 mega prime321 LLR Amethyst: Earned 1,000,000 credits (1,071,031)Cullen LLR Amethyst: Earned 1,000,000 credits (1,165,737)ESP LLR Amethyst: Earned 1,000,000 credits (1,021,868)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,046,510)PPS LLR Turquoise: Earned 5,000,000 credits (5,090,575)PSP LLR Amethyst: Earned 1,000,000 credits (1,291,823)SoB LLR Amethyst: Earned 1,000,000 credits (1,043,824)SR5 LLR Amethyst: Earned 1,000,000 credits (1,000,984)SGS LLR Turquoise: Earned 5,000,000 credits (5,095,282)TRP LLR Amethyst: Earned 1,000,000 credits (1,033,808)Woodall LLR Amethyst: Earned 1,000,000 credits (1,088,488)321 Sieve Ruby: Earned 2,000,000 credits (2,613,761)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (944,431)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,813,253)PPS Sieve Double Silver: Earned 200,000,000 credits (338,610,289)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,446,797)AP 26/27 Sapphire: Earned 20,000,000 credits (33,136,428)GFN Sapphire: Earned 20,000,000 credits (26,158,890)PSA Sapphire: Earned 20,000,000 credits (20,457,430)
Message 84886 - Posted: 16 Apr 2015 | 12:58:54 UTC - in response to Message 84883.

I'm currently building a 3 GPU system on a z97 Asus Pro (wifi). Linux or Win 8.1 - the motherboard has yet to detect any of the GPU's (GTX970/GTX750/GT630) for the OS.

Linux on a USB (never went past POST) for the option to install. Switched over to Win8.1 installation and all went well expect the MB can't detect GPU"S in UFEI mode or not.

Any ideas?

A side note: Haswell's "rated" TDP is never anywhere the supposed number. A 65W TDP Haswell draws 89 watts on four cores - 63W for 3 - 45W for 2. Never run a stock cooler fan while computing LLR!


No ideas about Linux that aren't outdated, but in Windows always start with one gpu, then add the 2nd then add the third. Windows has a bad habit of disabling gpu's on start-up if nothing is plugged into them, starting with a single gpu gets around that problem, which can then be solved by a "dummy plug" and then in Boinc by a 'cc_config.xml' file that tells Boinc to 'use all gpu's'.

You could also try a free Windows10 trial, in my experience it is NOT ready for primetime, and the 10041 version has some big problems, which in later versions are reportedly fixed, but they haven't been pushed out to me yet. I use it just fine on a Boinc only machine, on an everyday machine it would NOT be my choice though!!

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Discovered 2 mega primesFound 1 prime in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (803,631)Cullen LLR Gold: Earned 500,000 credits (620,013)ESP LLR Gold: Earned 500,000 credits (728,572)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (585,120)PPS LLR Turquoise: Earned 5,000,000 credits (6,845,262)PSP LLR Gold: Earned 500,000 credits (506,876)SoB LLR Silver: Earned 100,000 credits (379,643)SR5 LLR Ruby: Earned 2,000,000 credits (4,783,071)SGS LLR Amethyst: Earned 1,000,000 credits (1,006,021)TRP LLR Ruby: Earned 2,000,000 credits (2,403,013)Woodall LLR Gold: Earned 500,000 credits (509,918)321 Sieve Ruby: Earned 2,000,000 credits (2,035,186)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,122,369)PPS Sieve Double Gold: Earned 500,000,000 credits (758,906,488)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,058,245)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (3,185,685)AP 26/27 Turquoise: Earned 5,000,000 credits (9,901,307)GFN Double Gold: Earned 500,000,000 credits (592,432,913)
Message 84887 - Posted: 16 Apr 2015 | 13:48:23 UTC - in response to Message 84886.

I'm currently building a 3 GPU system on a z97 Asus Pro (wifi). Linux or Win 8.1 - the motherboard has yet to detect any of the GPU's (GTX970/GTX750/GT630) for the OS.

Linux on a USB (never went past POST) for the option to install. Switched over to Win8.1 installation and all went well expect the MB can't detect GPU"S in UFEI mode or not.

Any ideas?

A side note: Haswell's "rated" TDP is never anywhere the supposed number. A 65W TDP Haswell draws 89 watts on four cores - 63W for 3 - 45W for 2. Never run a stock cooler fan while computing LLR!


No ideas about Linux that aren't outdated, but in Windows always start with one gpu, then add the 2nd then add the third. Windows has a bad habit of disabling gpu's on start-up if nothing is plugged into them, starting with a single gpu gets around that problem, which can then be solved by a "dummy plug" and then in Boinc by a 'cc_config.xml' file that tells Boinc to 'use all gpu's'.

You could also try a free Windows10 trial, in my experience it is NOT ready for primetime, and the 10041 version has some big problems, which in later versions are reportedly fixed, but they haven't been pushed out to me yet. I use it just fine on a Boinc only machine, on an everyday machine it would NOT be my choice though!!


After updating chipset/BIOS/Win8.1 drivers: still no GPU acknowledgement success. (Nvidia driver installer says it "can't find any compatible hardware." Each graphic card has monitor connected: VGA for the GT630 - HDMI for both the 750 and 970. Tried putting the GPU into different PCI slots for each. Neither the BIOS settings or device manager sees any of GPU's no matter. There is power going to them as the fans spin on 970 (750/630 are heatsink only) Pulling 630/750 out while system is on - the system resets into BIOS stating a power error.

Murphy's law

USB memory for Linux was corrupt - explains the dead install.


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Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 23 mega primesEliminated 7 conjecture "k"sDiscovered 1 Sophie Germain pairDiscovered 2 Fermat divisors2012 Tour de Primes highest prime count2012 Tour de Primes most Mountain Stage primes2015 Tour de Primes highest prime count2016 Tour de Primes highest prime countFound 23 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 2 primes in the 2018 Tour de Primes Mountain Stage2019 Tour de Primes highest prime countFound 22 primes in the 2019 Tour de PrimesFound 10 primes in the 2020 Tour de PrimesFound 4 mega primes in the 2020 Tour de Primes321 LLR Double Bronze: Earned 100,000,000 credits (110,931,288)Cullen LLR Double Bronze: Earned 100,000,000 credits (103,870,990)ESP LLR Double Bronze: Earned 100,000,000 credits (137,499,413)Generalized Cullen/Woodall LLR Double Bronze: Earned 100,000,000 credits (108,461,080)PPS LLR Double Gold: Earned 500,000,000 credits (503,473,285)PSP LLR Double Bronze: Earned 100,000,000 credits (126,982,721)SoB LLR Double Bronze: Earned 100,000,000 credits (135,747,083)SR5 LLR Double Silver: Earned 200,000,000 credits (203,047,213)SGS LLR Double Bronze: Earned 100,000,000 credits (162,580,085)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Bronze: Earned 100,000,000 credits (121,443,822)Woodall LLR Double Bronze: Earned 100,000,000 credits (101,447,725)321 Sieve Double Silver: Earned 200,000,000 credits (210,818,608)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve (suspended) Double Silver: Earned 200,000,000 credits (285,139,652)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,142,605,109)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Double Silver: Earned 200,000,000 credits (203,523,358)TRP Sieve (suspended) Double Silver: Earned 200,000,000 credits (201,489,157)AP 26/27 Double Silver: Earned 200,000,000 credits (221,761,085)GFN Double Amethyst: Earned 1,000,000,000 credits (1,519,526,087)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 84888 - Posted: 16 Apr 2015 | 14:49:48 UTC - in response to Message 84887.


This might be going on because the system thinks you are planning to SLI, but some of your cards--the 630 for sure and maybe the 750--cannot SLI. I would double check and make sure that all SLI (hardware and software) is set to the off position.

Also, if the board has onboard GPU, then make sure that the onboard GPU is set to off as well.

I would also try the 970 by itself first (with the system powered off to install/uninstall cards). Then add the other two cards one at a time.

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Discovered 1 mega primeFound 3 primes in the 2018 Tour de Primes321 LLR Amethyst: Earned 1,000,000 credits (1,374,650)Cullen LLR Amethyst: Earned 1,000,000 credits (1,512,653)ESP LLR Gold: Earned 500,000 credits (710,747)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,205,397)PPS LLR Ruby: Earned 2,000,000 credits (2,305,618)PSP LLR Ruby: Earned 2,000,000 credits (2,113,325)SoB LLR Ruby: Earned 2,000,000 credits (2,921,805)SR5 LLR Amethyst: Earned 1,000,000 credits (1,226,858)SGS LLR Gold: Earned 500,000 credits (632,629)TRP LLR Turquoise: Earned 5,000,000 credits (5,315,636)Woodall LLR Silver: Earned 100,000 credits (127,395)321 Sieve Bronze: Earned 10,000 credits (88,433)Generalized Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,626,395)PPS Sieve Double Bronze: Earned 100,000,000 credits (135,099,567)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (555,042)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,089,296)AP 26/27 Turquoise: Earned 5,000,000 credits (6,347,510)GFN Double Silver: Earned 200,000,000 credits (225,822,647)
Message 84889 - Posted: 16 Apr 2015 | 16:12:12 UTC - in response to Message 84887.

Pulling 630/750 out while system is on - the system resets into BIOS stating a power error.

I would shut the system down and turn off master switch on power supply unit before adding or removing graphics cards. I don't think they are meant to be hot swappable in the PCI-E slots.

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Discovered 2 mega primesFound 1 prime in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (803,631)Cullen LLR Gold: Earned 500,000 credits (620,013)ESP LLR Gold: Earned 500,000 credits (728,572)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (585,120)PPS LLR Turquoise: Earned 5,000,000 credits (6,845,262)PSP LLR Gold: Earned 500,000 credits (506,876)SoB LLR Silver: Earned 100,000 credits (379,643)SR5 LLR Ruby: Earned 2,000,000 credits (4,783,071)SGS LLR Amethyst: Earned 1,000,000 credits (1,006,021)TRP LLR Ruby: Earned 2,000,000 credits (2,403,013)Woodall LLR Gold: Earned 500,000 credits (509,918)321 Sieve Ruby: Earned 2,000,000 credits (2,035,186)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,122,369)PPS Sieve Double Gold: Earned 500,000,000 credits (758,906,488)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,058,245)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (3,185,685)AP 26/27 Turquoise: Earned 5,000,000 credits (9,901,307)GFN Double Gold: Earned 500,000,000 credits (592,432,913)
Message 84890 - Posted: 16 Apr 2015 | 16:24:23 UTC - in response to Message 84888.


This might be going on because the system thinks you are planning to SLI, but some of your cards--the 630 for sure and maybe the 750--cannot SLI. I would double check and make sure that all SLI (hardware and software) is set to the off position.

Also, if the board has onboard GPU, then make sure that the onboard GPU is set to off as well.

I would also try the 970 by itself first (with the system powered off to install/uninstall cards). Then add the other two cards one at a time.


Leaning towards a bad z97 MB. I have a spare Z87 mITX board with one PciE slot to test the 970/750 to make sure pins are not messed up on GPU before I RMA.

Jumped RTC RAM and reset CMOS. Configured many BIOS settings. Nvidia drivers can't see any of GPU's to engage. (When I try to install drivers: the first step: "checking compatibility" errors out to a hardware message - no GPU's are found - no matter what GPU or how many slots are filled and where.

The Intel iGPU was disabled for the first half while moving GPU's into pcie slots. (Tried 970 alone) When the Intel was enabled each card went into pcie either alone/two at time or all three to see if any would be seen by BIOS or OS. The GT630 was seen in the 2nd Pcie slot only by BIOS but not the OS. As of now: the OS and BIOS are blind to the 750 or 970 (monitors plugged in). I've disabled the Intel iGPU again to see if the NVidia GPU's alone are seen after a few more Pcie BIOS changes.

I would shut the system down and turn off master switch on power supply unit before adding or removing graphics cards. I don't think they are meant to be hot swappable in the PCI-E slots.

Yes - I have the PSU power unplugged with master off when cards are changed around. I pulled them out to confirm power from PCIe was active.

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321 LLR Amethyst: Earned 1,000,000 credits (1,446,317)Cullen LLR Ruby: Earned 2,000,000 credits (2,100,744)ESP LLR Ruby: Earned 2,000,000 credits (3,638,182)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,159,526)PPS LLR Amethyst: Earned 1,000,000 credits (1,307,875)PSP LLR Jade: Earned 10,000,000 credits (10,408,711)SoB LLR Sapphire: Earned 20,000,000 credits (22,944,219)SR5 LLR Ruby: Earned 2,000,000 credits (2,014,726)SGS LLR Amethyst: Earned 1,000,000 credits (1,085,939)TRP LLR Turquoise: Earned 5,000,000 credits (5,630,136)Woodall LLR Ruby: Earned 2,000,000 credits (2,035,102)321 Sieve Ruby: Earned 2,000,000 credits (2,146,795)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,190,376)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,651,496)PPS Sieve Double Silver: Earned 200,000,000 credits (215,160,596)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (3,591,642)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,819,072)AP 26/27 Ruby: Earned 2,000,000 credits (2,150,876)GFN Sapphire: Earned 20,000,000 credits (22,745,636)PSA Sapphire: Earned 20,000,000 credits (38,445,145)
Message 84894 - Posted: 16 Apr 2015 | 17:24:13 UTC
Last modified: 16 Apr 2015 | 17:24:41 UTC

I agree with Wingless Wonder though, you should never pull out PCI-e cards with the system switched on. There's an awful lot of amperage going to those cards, and obviously not just from the slot itself. I'm not sure about the 630 requiring PCI-e cables from the PSU, but the 750 surely does? If you were omitting plugging those in too, then it complicates things more.

I know it's a bit late to be saying that now, it's just something which should probably be avoided in any situation.

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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,822,730)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Jade: Earned 10,000,000 credits (11,975,372)PSP LLR Turquoise: Earned 5,000,000 credits (5,197,957)SoB LLR Sapphire: Earned 20,000,000 credits (34,221,148)SR5 LLR Turquoise: Earned 5,000,000 credits (9,110,006)SGS LLR Ruby: Earned 2,000,000 credits (2,014,138)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (7,508,827)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,114,260)GFN Emerald: Earned 50,000,000 credits (71,061,795)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 84897 - Posted: 16 Apr 2015 | 17:45:04 UTC

I know others have said it, but for the benefit of anyone reading this thread, you should never, under any circumstances, insert or remove (almost *) anything from a motherboard unless it is powered off and the power cord is disconnected. Permanent damage, including total failure, of the motherboard or anything connected to to the motherboard (CPU, RAM, power supply, etc.) may result.

(*) The sole exception are components explicitly designed to be removed when powered on, which include USB connections, SATA devices, and anything plugged into an external connector. Also, note that while it's "safe" to hot-swap a SATA device, that only means the hardware won't be damaged. The data may be corrupted unless proper device shutdown procedures are followed, e.g., "eject hardware" under Windows.
____________
Please do not PM me with support questions. Ask on the forums instead. Thank you!

My lucky number is 75898524288+1

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Discovered 2 mega primesFound 1 prime in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (803,631)Cullen LLR Gold: Earned 500,000 credits (620,013)ESP LLR Gold: Earned 500,000 credits (728,572)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (585,120)PPS LLR Turquoise: Earned 5,000,000 credits (6,845,262)PSP LLR Gold: Earned 500,000 credits (506,876)SoB LLR Silver: Earned 100,000 credits (379,643)SR5 LLR Ruby: Earned 2,000,000 credits (4,783,071)SGS LLR Amethyst: Earned 1,000,000 credits (1,006,021)TRP LLR Ruby: Earned 2,000,000 credits (2,403,013)Woodall LLR Gold: Earned 500,000 credits (509,918)321 Sieve Ruby: Earned 2,000,000 credits (2,035,186)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,122,369)PPS Sieve Double Gold: Earned 500,000,000 credits (758,906,488)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,058,245)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (3,185,685)AP 26/27 Turquoise: Earned 5,000,000 credits (9,901,307)GFN Double Gold: Earned 500,000,000 credits (592,432,913)
Message 84898 - Posted: 16 Apr 2015 | 18:01:53 UTC - in response to Message 84890.
Last modified: 16 Apr 2015 | 18:04:43 UTC

After much tinkering I've ruled out a bad MB: BIOS now see's all three GPU's (Slot 1/2/3 no matter the GPU's order) with Intel iGPU enabled or disabled - although the OS is unaware of all three.

I agree with Wingless Wonder though, you should never pull out PCI-e cards with the system switched on. There's an awful lot of amperage going to those cards, and obviously not just from the slot itself. I'm not sure about the 630 requiring PCI-e cables from the PSU, but the 750 surely does? If you were omitting plugging those in too, then it complicates things more.

I know it's a bit late to be saying that now, it's just something which should probably be avoided in any situation.


I was over zealous and forgot protocol. Fortunately - nothing was (GT630) blown while making this (costly) mistake.

The 25W/384CUDA GT630 has no 6/8 pin. The Gtx750 has a 6pin. The 970 has [2] 8pin. I have custom VBIOS for both the 750 and 970. (Once I get the OS to see the Maxwell GPU's a flash is in order.) The 4+1 750 is locked 38.5W yet capable of 150% power target with a redone VBIOS. A non-reference Zotac 970 8+3+2 power phase PCB is locked at 125% but with a custom golden sample (F3) BIOS it can reach 150% power target with-in a 225-250W limit.

I'm impressed with S series Haswell. Having XMP enabled at 2133 C9 RAM speeds up processing times. Liquid cooling or a top notch air is a must for long term LLR/Genefer compute on any Haswell.

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321 LLR Amethyst: Earned 1,000,000 credits (1,446,317)Cullen LLR Ruby: Earned 2,000,000 credits (2,100,744)ESP LLR Ruby: Earned 2,000,000 credits (3,638,182)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,159,526)PPS LLR Amethyst: Earned 1,000,000 credits (1,307,875)PSP LLR Jade: Earned 10,000,000 credits (10,408,711)SoB LLR Sapphire: Earned 20,000,000 credits (22,944,219)SR5 LLR Ruby: Earned 2,000,000 credits (2,014,726)SGS LLR Amethyst: Earned 1,000,000 credits (1,085,939)TRP LLR Turquoise: Earned 5,000,000 credits (5,630,136)Woodall LLR Ruby: Earned 2,000,000 credits (2,035,102)321 Sieve Ruby: Earned 2,000,000 credits (2,146,795)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,190,376)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,651,496)PPS Sieve Double Silver: Earned 200,000,000 credits (215,160,596)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (3,591,642)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,819,072)AP 26/27 Ruby: Earned 2,000,000 credits (2,150,876)GFN Sapphire: Earned 20,000,000 credits (22,745,636)PSA Sapphire: Earned 20,000,000 credits (38,445,145)
Message 84900 - Posted: 16 Apr 2015 | 18:55:00 UTC

Can you tell us which PSU you're using please?

eXaPower
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Discovered 2 mega primesFound 1 prime in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (803,631)Cullen LLR Gold: Earned 500,000 credits (620,013)ESP LLR Gold: Earned 500,000 credits (728,572)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (585,120)PPS LLR Turquoise: Earned 5,000,000 credits (6,845,262)PSP LLR Gold: Earned 500,000 credits (506,876)SoB LLR Silver: Earned 100,000 credits (379,643)SR5 LLR Ruby: Earned 2,000,000 credits (4,783,071)SGS LLR Amethyst: Earned 1,000,000 credits (1,006,021)TRP LLR Ruby: Earned 2,000,000 credits (2,403,013)Woodall LLR Gold: Earned 500,000 credits (509,918)321 Sieve Ruby: Earned 2,000,000 credits (2,035,186)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,122,369)PPS Sieve Double Gold: Earned 500,000,000 credits (758,906,488)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,058,245)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (3,185,685)AP 26/27 Turquoise: Earned 5,000,000 credits (9,901,307)GFN Double Gold: Earned 500,000,000 credits (592,432,913)
Message 84901 - Posted: 16 Apr 2015 | 19:16:13 UTC - in response to Message 84900.

Can you tell us which PSU you're using please?

Rosewill Fortress (Platinum) 750-Watt Active PFC

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321 LLR Amethyst: Earned 1,000,000 credits (1,446,317)Cullen LLR Ruby: Earned 2,000,000 credits (2,100,744)ESP LLR Ruby: Earned 2,000,000 credits (3,638,182)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,159,526)PPS LLR Amethyst: Earned 1,000,000 credits (1,307,875)PSP LLR Jade: Earned 10,000,000 credits (10,408,711)SoB LLR Sapphire: Earned 20,000,000 credits (22,944,219)SR5 LLR Ruby: Earned 2,000,000 credits (2,014,726)SGS LLR Amethyst: Earned 1,000,000 credits (1,085,939)TRP LLR Turquoise: Earned 5,000,000 credits (5,630,136)Woodall LLR Ruby: Earned 2,000,000 credits (2,035,102)321 Sieve Ruby: Earned 2,000,000 credits (2,146,795)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,190,376)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,651,496)PPS Sieve Double Silver: Earned 200,000,000 credits (215,160,596)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (3,591,642)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,819,072)AP 26/27 Ruby: Earned 2,000,000 credits (2,150,876)GFN Sapphire: Earned 20,000,000 credits (22,745,636)PSA Sapphire: Earned 20,000,000 credits (38,445,145)
Message 84902 - Posted: 16 Apr 2015 | 20:11:41 UTC
Last modified: 16 Apr 2015 | 20:39:47 UTC

I think you've probably just about covered your system for those 3 cards plus the core components, then. The thing to look out for is not the rated power draw in watts, or the minimum wattage of the recommended PSU, but the maximum amount of amps all three might want at the same time @ 12V - if it exceeds your PSU's max. amps @ 12V rating with the PCI-e connectors (the cables/plugs, not what the slot itself can provide), then problems could arise. With the motherboard, too.

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Discovered 2 mega primesFound 1 prime in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (803,631)Cullen LLR Gold: Earned 500,000 credits (620,013)ESP LLR Gold: Earned 500,000 credits (728,572)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (585,120)PPS LLR Turquoise: Earned 5,000,000 credits (6,845,262)PSP LLR Gold: Earned 500,000 credits (506,876)SoB LLR Silver: Earned 100,000 credits (379,643)SR5 LLR Ruby: Earned 2,000,000 credits (4,783,071)SGS LLR Amethyst: Earned 1,000,000 credits (1,006,021)TRP LLR Ruby: Earned 2,000,000 credits (2,403,013)Woodall LLR Gold: Earned 500,000 credits (509,918)321 Sieve Ruby: Earned 2,000,000 credits (2,035,186)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,122,369)PPS Sieve Double Gold: Earned 500,000,000 credits (758,906,488)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,058,245)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (3,185,685)AP 26/27 Turquoise: Earned 5,000,000 credits (9,901,307)GFN Double Gold: Earned 500,000,000 credits (592,432,913)
Message 84904 - Posted: 16 Apr 2015 | 21:39:45 UTC - in response to Message 84902.
Last modified: 16 Apr 2015 | 21:40:25 UTC

I think you've probably just about covered your system for those 3 cards plus the core components, then. The thing to look out for is not the rated power draw in watts, or the minimum wattage of the recommended PSU, but the maximum amount of amps all three might want at the same time @ 12V - if it exceeds your PSU's max. amps @ 12V rating with the PCI-e connectors (the cables/plugs, not what the slot itself can provide), then problems could arise. With the motherboard, too.


Indeed - my PSU 12V single rail is rated for 62.5A. If I added another 970 with 750/970 then the Amp limit will be close if all GPU's are over 125% power target. ( The 750/630 would go on another MB if a second 970 is added.) Most (6+2) 970's require 19-27A running full bore at 125%. The non-reference overclocked 125-150% Zotac equates to 25-35A. 12V Single rail 750-1000W PSU's are rated 45-85A while 1000-1600 are 90-140A.

Signs point to UFEI being the root of my problems: no matter what I choose the system always boot into legacy mode. (press shift while restarting or command shutdown.exe /r /o) advanced win8.1 UFEI options are missing (my other Win8.1 machine has these options). OS is blind to any of GPU's even though the BIOS shows each and how many lanes are being run (8x/8x/ x4 from the chipset) and CPU connect is (8x/x4/x4).

Installing Win10 as a hail mary to see if UFEI makes a difference. As I don't have a working USB I can't test Linux today. OS footprint size is important as this machine will be for crunching only.

Message boards : Number crunching : How many GPU'S

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