Message boards : Graphics cards (GPUs) : Need help on setup
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=[PULSAR]= Send message Joined: 22 Feb 10 Posts: 9 Credit: 16,172,951 RAC: 0 Level  Scientific publications     | |
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I've tried doing this over the past week with no success. I am running 2x GTX 295, 1x 9800GX2 on a single machine with SLI and physx disabled and still can only get gpu 1 to work. Help is appreciated. | |
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=[PULSAR]= Send message Joined: 22 Feb 10 Posts: 9 Credit: 16,172,951 RAC: 0 Level Scientific publications | |
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bump for help :) | |
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 K1atOdessaSend message Joined: 25 Feb 08 Posts: 249 Credit: 370,320,941 RAC: 0 Level  Scientific publications   | |
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Do you use a cc_config.xml file in your BOINC data directory? | |
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=[PULSAR]= Send message Joined: 22 Feb 10 Posts: 9 Credit: 16,172,951 RAC: 0 Level Scientific publications | |
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If I enable SLI and physx boinc will see 5 gpus 4 295 and 1 9800gx2, but will only fold start tasks for 3 of them. When I try to extend monitors on all cards boinc will only see gpu 0 and gpu 1. I have also tried the config file with no luck. | |
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robertmiles  Send message Joined: 16 Apr 09 Posts: 503 Credit: 727,920,933 RAC: 19,482 Level  Scientific publications | |
If I enable SLI and physx boinc will see 5 gpus 4 295 and 1 9800gx2, but will only fold start tasks for 3 of them. When I try to extend monitors on all cards boinc will only see gpu 0 and gpu 1. I have also tried the config file with no luck. Have you checked if extending the monitor only to all the 295s offers at least some improvement? Is there an extra connection between one 295 and the next that might allow use of the new 4-way SLI to treat two 295s as just one GPU? Have you checked if use of the usual 2-way SLI in a 295 allows the GPUGRID application to treat the whole 295 as just one GPU, but one about twice as fast? Have you checked if your CPU is powerful enough to handle the CPU time requirements of interfacing to all the GPUs you have at once? I've seen some hints that the current software versions might concentrate the effort of driving multiple GPUs on just one CPU core; you might look for signs this has happened. Also, you might check if enabling only SLI or only physx makes any changes in the results, if you don't want to wait for someone who actually has that set of cards. If BOINC recognizes only two GPUs, does it mention which GPU types they are? Also, which BOINC version are you using? I've seen some messages saying that some versions work better with SLI enabled and some work better with it disabled. | |
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skgiven Volunteer moderator Volunteer tester  Send message Joined: 23 Apr 09 Posts: 3968 Credit: 1,995,359,260 RAC: 0 Level  Scientific publications  | |
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Remove your 9800gx2 and use the two GTX 295 cards. | |
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Message boards : Graphics cards (GPUs) : Need help on setup
