Message boards :
Number crunching :
8 GPUs
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Author | Message |
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Dragokatzov Send message Joined: 6 May 00 Posts: 45 Credit: 15,742,981 RAC: 5 |
I've noticed some users have systems with 8 GPUs. I have been thinking of getting my own system with 8 GPUs but I am curious to anyone with such a setup. are these systems of a standard ATX configuration or what? Also if they are on an ATX box, what motherboards are being used? what cases? and is there anything special about the about the GPUs themselves? i noticed most of the are GTX 295's but they take two slots, and i don't think there is a 16 slot ATX case in existence. or does a single 295 register as two cards in boinc? thanks! |
skildude Send message Joined: 4 Oct 00 Posts: 9541 Credit: 50,759,529 RAC: 60 |
I think what you are seeing are people with the Nvidia 295 card which reads as 2 cards. so when someone installs 4 on one PC it looks like 8 however the Motherboards that take 4 GPUs are far from ordinary and cheap. Plus the need for an extremely large PSU and you are looking at somewhere around $3000US just to start. In a rich man's house there is no place to spit but his face. Diogenes Of Sinope |
Dragokatzov Send message Joined: 6 May 00 Posts: 45 Credit: 15,742,981 RAC: 5 |
Thats all what i figured! thanks for the clarification |
zoom3+1=4 Send message Joined: 30 Nov 03 Posts: 65709 Credit: 55,293,173 RAC: 49 |
I think what you are seeing are people with the Nvidia 295 card which reads as 2 cards. Plus one needs a case like the HAF-X(HAF-142?) from Coolermaster, Plus an EVGA Classified motherboard with 4 or 7 slots at the right spacing, A large psu is a must, Anywhere from 1250w to 1500w should do, Forget any MSI Big Bang Motherboards as they have the slots, But aren't dual gpu card compatible and they probably won't ever be compatible most likely do the Lucid Hydra chip using a driver that doesn't know how to talk to an NF200 chip as Nvidia is a competitor to Lucid in this area. ATi dual gpu cards also do not work with the Lucid Hydra chip either, Why I don't know of course, It may be the same problem as on the equivalent Nvidia cards. The T1 Trust, PRR T1 Class 4-4-4-4 #5550, 1 of America's First HST's |
J. Mileski Send message Joined: 9 Jun 02 Posts: 632 Credit: 172,116,532 RAC: 572 |
There is a 8 GPU motherboard and case, made by Tyan and sold through http://www.velocitymicro.com/wizard.php?sr=0&iid=190. It is not cheap and I am guessing not cheap to run. It can be configured with either the Tesla cards or the GeForce cards. There are only two 2.5" bays for SATA laptop drives or SSDs. There are no external drive bays. |
Sutaru Tsureku Send message Joined: 6 Apr 07 Posts: 7105 Credit: 147,663,825 RAC: 5 |
The currently top_host_#1, Vypers 4x GTX295 machine, is with a MSI K9A2 Platinum mobo. + AMD CPU. Not very expensive, compared to the Intel stuff. ;-) I have the same mobo, but with 4x GTX260 OC. 1250 W PSU. ~ 700 W full load SETI@home. ~ 75,000 S@h-RAC (currently offline for rebuild/maintenance). |
Wiggo Send message Joined: 24 Jan 00 Posts: 34744 Credit: 261,360,520 RAC: 489 |
There is a 8 GPU motherboard and case, made by Tyan and sold through http://www.velocitymicro.com/wizard.php?sr=0&iid=190. It is not cheap and I am guessing not cheap to run. It can be configured with either the Tesla cards or the GeForce cards. There are only two 2.5" bays for SATA laptop drives or SSDs. There are no external drive bays. Now if I ever won the lottery that system would be awesome spec'd with dual hex CPU's, triple 1200W PSU's and then fill it with eight GTX560's (just under $12,000). What a monster. I'll go and buy a couple of tickets in the morning. :) Cheers. |
Some1new Send message Joined: 10 Jun 04 Posts: 52 Credit: 830,640 RAC: 0 |
Up to 8TFLops? That would be crunching like hell. Awesome power bill, too. All that we see or seem is but a dream within a dream. |
Dave Send message Joined: 29 Mar 02 Posts: 778 Credit: 25,001,396 RAC: 0 |
If it's your passion & u can afford both purchase + kWh elec-consump it's yours. |
Todd Hebert Send message Joined: 16 Jun 00 Posts: 648 Credit: 228,292,957 RAC: 0 |
You might see a rig such as described here but with 16 gpu's installed very soon! |
Sutaru Tsureku Send message Joined: 6 Apr 07 Posts: 7105 Credit: 147,663,825 RAC: 5 |
You might see a rig such as described here but with 16 gpu's installed very soon! GTX590? So 8 cards installed? Which mobo? ATX standard, so only 1 slot wide cards would fit? One slot wide cards, with water cooling? But, if I look to my GPU cruncher with MSI K9A2 Platinum mobo (ATX standard), there could be only 7 slots. (3 more slots between the 4, then the mobo is ended ;-) Ohh.. if I would have money.. *sigh* *dreaming* We're crazy, aren't we? ;-D EDIT: 5,000. message from me here in the S@h forum. ;-) |
Sutaru Tsureku Send message Joined: 6 Apr 07 Posts: 7105 Credit: 147,663,825 RAC: 5 |
OTOH, IIRC, Windows see max 8 GPUs.. so the max is (currently) 8 cards with 1 GPU each, or 4 cards with 2 GPUs each. But maybe someone other know it for sure. |
Wiggo Send message Joined: 24 Jan 00 Posts: 34744 Credit: 261,360,520 RAC: 489 |
You might see a rig such as described here but with 16 gpu's installed very soon! With one of these you can fit 8x2 slot cards, http://www.velocitymicro.com/wizard.php?sr=0&iid=190. ;) Cheers. |
Mike Send message Joined: 17 Feb 01 Posts: 34253 Credit: 79,922,639 RAC: 80 |
HD 6990 I guess with 4 such monsters we would get trouble to find a good PSU. 450 Watt with hidden Bios settings. 2 bios 375 - 450 Watt. 2-8 pin plugs. With each crime and every kindness we birth our future. |
-BeNt- Send message Joined: 17 Oct 99 Posts: 1234 Credit: 10,116,112 RAC: 0 |
You might see a rig such as described here but with 16 gpu's installed very soon! I don't like you very much Todd. ;) (I'm so jealous, if you do that you should have to give another one of your monsters to me!) Traveling through space at ~67,000mph! |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14649 Credit: 200,643,578 RAC: 874 |
HD 6990 Mike, that site is showing a sign requesting that you don't link their images. Changed to a url instead of an img. |
Mike Send message Joined: 17 Feb 01 Posts: 34253 Credit: 79,922,639 RAC: 80 |
HD 6990 Thanks Richard. With each crime and every kindness we birth our future. |
ML1 Send message Joined: 25 Nov 01 Posts: 20147 Credit: 7,508,002 RAC: 20 |
OTOH, IIRC, Windows see max 8 GPUs.. so the max is (currently) 8 cards with 1 GPU each, or 4 cards with 2 GPUs each. ... In that case, just move over and use Linux. No problem. Happy super-fast crunchin', Martin See new freedom: Mageia Linux Take a look for yourself: Linux Format The Future is what We all make IT (GPLv3) |
Fred J. Verster Send message Joined: 21 Apr 04 Posts: 3252 Credit: 31,903,643 RAC: 0 |
Another limitting factor, which I wasn't aware of... A Super Computer at/on your Desk Top, nice if it's electrical use don't exceed 3600*Watt/hour, which will force me to use, the 2nd or 3rd(unused phases) of my electrical wirering. (Only my electrical stove, uses 3x 230-240V at 7500Watt/hour; maximum use of all 4 heaters, with the maximum allowed 16Amp circuit-breakers, which I already switched for 20Amp* breakers, wirering can handle 25Amp/phase). It would require using an AC running, all the time. *(Now 4400Watt/hour; in theory even 4800W/h) I 'only' lack the necessary funds, a.t.m., but I'm 'working on it'. (An 'extra advantage' is, my landlord is a starting computer user and my rent now includes electricity, hopefully still after seeing his 'bill' ;^) ) While with the use of Optimized app.s and CUDA/OpenCL, crunching has only become more efficient, just have a look at the Top-Hosts, Credit v.s. (electricity-)use, is tipping the 'scale' in favor of Multi-GPU-use. And CPU's are also getting more and more efficient, only my X9650 (OC'ed) is capable of 3500 Whetstone FLOPS per core, which is quite common with i7's and i5's, atleast the faster ones. And I'm curious, how the latest (INTEL) i7's (CPU+GPU) compaire against a 'Dedicated GPU'!? In Crunching Terms, I tend to stay/go for the PCI-E xZZ dedicated GPU's, but these are hard to predict, IMHO. Haven't heard anything from AMD, as to changes in their CPU and GPU's Well, my 4 cents, before it gets a Novel, in 4 parts. :) Anyway, Happy Crunching. |
-BeNt- Send message Joined: 17 Oct 99 Posts: 1234 Credit: 10,116,112 RAC: 0 |
OTOH, IIRC, Windows see max 8 GPUs.. so the max is (currently) 8 cards with 1 GPU each, or 4 cards with 2 GPUs each. ... What set of cards would you have in a computer that see's more than 8 gpus to begin with? Most motherboard only fit 4x dual slot cards of 6 single slots......4x dual slots with 295/590/6990 etc. will only be 8 gpu's and 6 single slot cards would only be 6 cpus. The only time you would probably run into that issue is if you have 6x 295's water cooled for single slot which would be 12 gpu's however the Nvidia drivers only support 4 cards to begin with, which would be 8 cores max. At least that's my understanding. (I may be talking about SLi max and not total max not really sure) Traveling through space at ~67,000mph! |
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