Message boards : Graphics cards (GPUs) : Does exist a two GPU PC detailed guide for GPUGRID?
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I would like to read a detailed guide that explains how to configure a two GPUs PC under Vista to run two process (one in each GPU) of GPUGRID simultaneously. | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester  Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level  Scientific publications     | |
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Not sure what you mean. Setup is no different than "normal" GPU-crunching. Are you familiar with that? Apart from disabling SLI you don't have to do anything special to crunch on both GPUs. | |
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Not sure what you mean. Setup is no different than "normal" GPU-crunching. Are you familiar with that? Apart from disabling SLI you don't have to do anything special to crunch on both GPUs. Well, I'm now crunching GPUGRID with a monoGPU PC. Do you want to say that it will automatically recognize the two GPU's and will put to work properly? Suppose I have a quadcore crunching QMC and GPUGRID in a PC with two GPU's (not SLI). Will it automatically put two cores to crunch QMC and the other two to crunch GPU? | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level Scientific publications | |
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Exactly :) | |
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 K1atOdessaSend message Joined: 25 Feb 08 Posts: 249 Credit: 370,320,941 RAC: 0 Level  Scientific publications  | |
Suppose I have a quadcore crunching QMC and GPUGRID in a PC with two GPU's (not SLI). Will it automatically put two cores to crunch QMC and the other two to crunch GPU? Yes. Simply adding a 2nd GPU will be automatically recognized / utilized by GPUGrid (assuming you don't enable SLI). I have a Q6600 with 2 8800GT's. The line you will be looking for in the Messages upon BOINC startup is something similar to: 9/26/2008 8:53:41 PM||Coprocessor: GeForce 8800 GT (2) Notice the "(2)" following the identification of the coprocessor. | |
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Do I need a SLi chipset to install 2 cards ? I've got 3 PCI-E I could use but on Intel chipset. | |
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Kokomiko   Send message Joined: 18 Jul 08 Posts: 190 Credit: 24,093,690 RAC: 0 Level  Scientific publications  | |
Do I need a SLi chipset to install 2 cards ? I've got 3 PCI-E I could use but on Intel chipset. No and don't use SLI, otherwise it will not work. With windows you need often 2 monitors, on every card one, to get your card working. ____________   | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level Scientific publications | |
With windows you need often 2 monitors, on every card one, to get your card working. Oh damn, I forgot that! Under Vista and XP SP3 you need to have a desktop extended to each card, otherwise MS will not load the driver for the card and it can not be found by BOINC, kind of. And you can only do this if there is a monitor connected. But as far as I know this doesn't mean you actually need 2 monitors: if you have one with dual inputs or a KVM it should work as well. MrS ____________ Scanning for our furry friends since Jan 2002 | |
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K1atOdessa Send message Joined: 25 Feb 08 Posts: 249 Credit: 370,320,941 RAC: 0 Level Scientific publications | |
Under Vista and XP SP3 you need to have a desktop extended to each card, otherwise MS will not load the driver for the card and it can not be found by BOINC, kind of. And you can only do this if there is a monitor connected. But as far as I know this doesn't mean you actually need 2 monitors: if you have one with dual inputs or a KVM it should work as well. I have WinXP SP3 with two 8800GT's. I extended the desktop to the 2nd monitor without attaching a KVM / monitor to it -- works perfectly well with GPUGrid. | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level Scientific publications | |
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Oh, thanks for the info! So this is only neccessary under Vista? | |
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[AF>HFR>RR] Jim PROFIT Send message Joined: 3 Jun 07 Posts: 107 Credit: 31,331,137 RAC: 0 Level  Scientific publications | |
Oh, thanks for the info! So this is only neccessary under Vista? Exactly! Vista and Server 2K8! This is not a driver problem. Jim PROFIT | |
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fractal Send message Joined: 16 Aug 08 Posts: 87 Credit: 1,248,879,715 RAC: 0 Level Scientific publications  | |
With windows you need often 2 monitors, on every card one, to get your card working. I have two cards under xp sp3. I did not put any load on the second card (display, kvm or dummy load). I did not extend the desktop to the card. It was recognized by BOINC where it ran both cards for a week, and both are recognized by FAH. No dummy load, no extending the desktop. Note, that I *DID* have to do the kvm & extend desktop to get my first dual GPU system to run under Vista, which is why I built this one using XP. | |
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K1atOdessa Send message Joined: 25 Feb 08 Posts: 249 Credit: 370,320,941 RAC: 0 Level Scientific publications | |
This makes sense. I had to extend the desktop *not* to get BOINC to work, but only to run the card at full speed. For some reason, without extending the desktop, the 2nd 8800GT only ran at 1/2 speed (approx). But, it always was recognized as a 2nd coprocessor by BOINC and would run GPUGrid (though slowly due to the 1/2 speed issue). | |
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This makes sense. I had to extend the desktop *not* to get BOINC to work, but only to run the card at full speed. For some reason, without extending the desktop, the 2nd 8800GT only ran at 1/2 speed (approx). But, it always was recognized as a 2nd coprocessor by BOINC and would run GPUGrid (though slowly due to the 1/2 speed issue). Right and my experience was the same under Vista x64 also. The references that I have made to people having to extend the desktop in XP SP3 are based upon user claims. Not sure what the details are, but it appears that some XP SP3 users need to extend the desk top and some don't. I would guess that its not SP3 that causes the need, but some other windows update.....I really don't know one way or the other though.... | |
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Message boards : Graphics cards (GPUs) : Does exist a two GPU PC detailed guide for GPUGRID?
