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

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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My Lucky Number is 1893*2^1283297+1

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.

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.

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.....

Can anyone tell me what this is?
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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

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!

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!

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!!

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

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.

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.

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.

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.

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

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

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.

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.