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Message boards : Problems and Help : ram clock throttling ???

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Message 35187 - Posted: 12 Apr 2011 | 6:04:09 UTC

hello.

Ram clock throttling works on milkyway to reduce heat also saves electricity
is the same thing true of this project ?
throttling makes no differance on that project to work done by the card as its not ram intensive

best regards
Ian

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Message 35191 - Posted: 12 Apr 2011 | 9:00:10 UTC - in response to Message 35187.
Last modified: 12 Apr 2011 | 9:23:09 UTC

Cant state definitively - not been at PG long enough .... however, I wondered the same thing, and did some sessions with very high memory bandwidth, and as low as I was happy with. I could see no difference in timings. Monitored both settings for 24 hrs each, so gave both a good go.

My test was with PPS Sieve AMD app on 5970s - may change with other Sieve types on different cards, or on NVidia, but I doubt it - should be broadly the same results re heat and power measured against each individual card type. May change with different card types, but I doubt it (for me I find the credit allocation for AMD PPS Sieve equates to Collatz on AMD as a broad comparitor)

Decided in the end the use of low memory - like MilkyWay - was good to go. Saves heat & power for no purpose.

EDIT:
I ended up running PPS Sieve at 860/500, suits me for my 5970s without pushing them to the edge (running on a 1090T), you could probably go down to 250-300 but I did not test that low. AMD PPS Sieve is a nice application, it does hog the CPU a bit (2x5970s need 3 CPU cores - it takes them like it not ) However its a solid and reliable app, as are the servers for it - servers are well looked after at PG, the server guys do a good job from where I sit .... a huge plus.

Regards
Zy

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Message 35195 - Posted: 12 Apr 2011 | 11:33:45 UTC
Last modified: 12 Apr 2011 | 11:35:58 UTC

hi.

never thought of differances between nvidia and Ati cards making a differance something else to think about and could need an answer from those in the know
i haved twin 5979's too on milkyway at present but as your probably aware there WU cashe allowance is pityful for cards like twin 5970 hook ups as the cashe is eaten up in 15 mins depending on overclock

of course maybe the longer and shorter WU on this project need various amounts of RAM i havent tested anything on here yet so would have to rely on your testing or if one of the programmers was around theirs

thank you very much for your help

any more help would be nice from admin programmers etc


best regards
Ian

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Message 35231 - Posted: 13 Apr 2011 | 10:26:54 UTC - in response to Message 35187.

hello.

Ram clock throttling works on milkyway to reduce heat also saves electricity
is the same thing true of this project ?
throttling makes no differance on that project to work done by the card as its not ram intensive

best regards
Ian


I have two Nvidia cards here, in different machines, and was told by a friend that if I overclocked the 'shaders' I would get more work done faster. It is true I am and I have not touched anything else. He said that 'shaders' were what mattered here at PG. This is my very first attempt at overclocking so have no idea beyond that. I crunch Proth Prime Search (Sieve) units.

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Message 35235 - Posted: 13 Apr 2011 | 12:27:40 UTC - in response to Message 35195.

hi.

never thought of differances between nvidia and Ati cards making a differance something else to think about and could need an answer from those in the know
i haved twin 5979's too on milkyway at present but as your probably aware there WU cashe allowance is pityful for cards like twin 5970 hook ups as the cashe is eaten up in 15 mins depending on overclock

of course maybe the longer and shorter WU on this project need various amounts of RAM i havent tested anything on here yet so would have to rely on your testing or if one of the programmers was around theirs

thank you very much for your help

any more help would be nice from admin programmers etc


best regards
Ian


Differences AMD/NVidia/Project can be huge - and not simplistically that AMD or NVidia are "better" in a silver bullet sense, lost of factors involved. In the end for a whole host of reasons a Project will end up using what they use. There is no such thing as "a GPU app is a GPU app", and its always best to find out what the performance level for your Card (NVidia or AMD) is at a Project. Dont always take the surface view that because a Project is currently predominently - say NVidia - that all things fast are NVidia (or the other way round to keep Pandora's Box firmly shut rofl).

Generally speaking a Project will be "known as" an NVidia or AMD "shop", always a good start knowing that, as its *likely* (but far from absolutely true .... treading on eggshells here ...) that those cards will perform better than the other Vendor at that project.

The datasets at PG are relatively small and RAM needs are not really a relevant factor, nothing to worry about. As a contrast, Collatz needs to reserve main system memory equivalent to 30% of a users GPU memory per GPU - if you are running 4 GPUs thats a chunky 1.3Gb of main system RAM - 4Gb machine, not an issue - on a 2Gb machine, could crash it. By in large though 99% of the time GPU application requirements are not an issue re RAM. Only at the extremes of hardware use can it be an issue.

Re MW - the new app 0.62 is very good, and cache increased to 12 perGPU, so for a twin 5970, its about a 30 min cache now. Performance is about 5% slower than 0.23, but a huge huge plus is its a very cool running app - and way less an egg fryer than 0.23 was.

Regards
Zy

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Message 35236 - Posted: 13 Apr 2011 | 12:40:36 UTC - in response to Message 35231.

hello.

Ram clock throttling works on milkyway to reduce heat also saves electricity
is the same thing true of this project ?
throttling makes no differance on that project to work done by the card as its not ram intensive

best regards
Ian


I have two Nvidia cards here, in different machines, and was told by a friend that if I overclocked the 'shaders' I would get more work done faster. It is true I am and I have not touched anything else. He said that 'shaders' were what mattered here at PG. This is my very first attempt at overclocking so have no idea beyond that. I crunch Proth Prime Search (Sieve) units.


Mikey

Go to http://www.guru3d.com, there you will find a whole host of reviews, and hardware guides/articles. Its a Site for extreme Overclockers, and is well respected for its realworld hardware reviews. If you trawl the Videocard reviews there in the hardware section (pretty certain you will find your own there), they usually include an overclocking performance session in the reviews.

By reading those - and "pass over" bits you initially dont understand, you'll get into it fairly quickly. You'll also find out the cautionary elements of GPU overclocking, you need to be real careful initially until you are used to it, about going to far as it can burn out the card in the long run. Dont over-react to that statement and run a mile to other way rofl - overclocking is fine, just take it step by step, and its a fun and rewarding exercise. Heat is your enemy (BIG BIG time) watch very carefully heat rises.

At that Site there is an excellent forum freqented by extremely helpful guys who believe fun is spending the day building their next nano computer, and sleep at night listening to subliminal tapes on the next IBM register :)

They are great guys, very very helpful as long as you remember your Please and Thank You's, and will jump in a forum to zap silly wannabies sounding off, so you can trust what they put out there.

Put the forum together with the Site Hardware reviews, and you start to collate phrases and wishes you use to Google on, then suddenly the world of overclocking opens up. Just take it a step at a time, its a fun ride :)

Regards
Zy

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Message 35294 - Posted: 14 Apr 2011 | 19:35:50 UTC

hi,

I've never heard of overclocking a shader before and wouldnt know how to do it ?
doesnt overclocking the clock speed of the gpu do the same thing ?

is PG the only project that this works on or does it work on others such as MW with ATI cards ?
yet again i've never seen overclocking a shader in an ATI card either
maybe this is just an nvidia card option as i dont have one yet i dont know

looks like when i do get an nvidia card i'll have to do some testing on ram clock settings per work done as heat disapation even a small bit is always welcome

thanks for your help guys

any help on the above would be great too lol

best regards
Ian

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Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 37 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 Primes2020 Tour de Primes highest prime scoreFound 21 primes in the 2020 Tour de PrimesFound 4 mega primes in the 2020 Tour de PrimesFound 8 primes in the 2021 Tour de PrimesFound 1 mega prime in the 2021 Tour de Primes321 LLR Double Silver: Earned 200,000,000 credits (201,403,028)Cullen LLR Double Silver: Earned 200,000,000 credits (201,409,561)ESP LLR Double Silver: Earned 200,000,000 credits (214,825,147)Generalized Cullen/Woodall LLR Double Silver: Earned 200,000,000 credits (201,112,468)PPS LLR Double Gold: Earned 500,000,000 credits (810,537,941)PSP LLR Double Silver: Earned 200,000,000 credits (201,749,918)SoB LLR Double Silver: Earned 200,000,000 credits (207,028,068)SR5 LLR Double Silver: Earned 200,000,000 credits (214,437,634)SGS LLR Double Silver: Earned 200,000,000 credits (205,718,935)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Silver: Earned 200,000,000 credits (201,215,056)Woodall LLR Double Silver: Earned 200,000,000 credits (201,651,344)321 Sieve (suspended) Double Silver: Earned 200,000,000 credits (235,451,253)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 (2,736,238,209)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 Gold: Earned 500,000,000 credits (512,586,204)GFN Double Ruby: Earned 2,000,000,000 credits (2,294,618,100)WW Double Ruby: Earned 2,000,000,000 credits (3,476,180,000)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 35301 - Posted: 14 Apr 2011 | 21:05:18 UTC - in response to Message 35294.

hi,

I've never heard of overclocking a shader before and wouldnt know how to do it ?
doesnt overclocking the clock speed of the gpu do the same thing ?

is PG the only project that this works on or does it work on others such as MW with ATI cards ?
yet again i've never seen overclocking a shader in an ATI card either
maybe this is just an nvidia card option as i dont have one yet i dont know

looks like when i do get an nvidia card i'll have to do some testing on ram clock settings per work done as heat disapation even a small bit is always welcome

thanks for your help guys

any help on the above would be great too lol

best regards
Ian


On NVidia cards, one can clock the GPU core and Shaders independently. For ATI cards, the core clock and stream processors clocks are locked together at the same speed.


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141941*2^4299438-1 is prime!


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Message 35302 - Posted: 14 Apr 2011 | 21:13:23 UTC - in response to Message 35294.

For AMD/ATI the clockrates for GPU-core and shaders are equal. Only nVidia-shaders running with the double clockrate of the GPU-core.
This should cache the difference in the amount of usable cores between AMD and nVidia. While nVidia has max 512 cores in the GTX580 (my GT240 has only 96 cores), AMD uses 1600 in 5870 (VLIW5), 1120 in 6870 (VLIW4) and 1536 in the 6970 (VLIW4)...

The speed of PPSsieve-cuda is only limited by the amount of cores and the clockrate of gpu but not for the memory. PPSsieve-cuda loads all needed data into the gpu at beginning of a unit and calculates this workunit. Other projects may have different needs.
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Message 35513 - Posted: 21 Apr 2011 | 14:34:05 UTC - in response to Message 35236.
Last modified: 21 Apr 2011 | 14:34:40 UTC

hello.

Ram clock throttling works on milkyway to reduce heat also saves electricity
is the same thing true of this project ?
throttling makes no differance on that project to work done by the card as its not ram intensive

best regards
Ian


I have two Nvidia cards here, in different machines, and was told by a friend that if I overclocked the 'shaders' I would get more work done faster. It is true I am and I have not touched anything else. He said that 'shaders' were what mattered here at PG. This is my very first attempt at overclocking so have no idea beyond that. I crunch Proth Prime Search (Sieve) units.


Mikey

Go to http://www.guru3d.com, there you will find a whole host of reviews, and hardware guides/articles. Its a Site for extreme Overclockers, and is well respected for its realworld hardware reviews. If you trawl the Videocard reviews there in the hardware section (pretty certain you will find your own there), they usually include an overclocking performance session in the reviews.
Just take it a step at a time, its a fun ride :)

Regards
Zy


Thank you for the link, I had it but never thought to use it as you described. I will be doing some reading soon. THANK YOU!!

Message boards : Problems and Help : ram clock throttling ???

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