I am burning in a new system that has 2 x 8800GT cards (Kubuntu 7.10, nvidia driver 169.09) on a Gigabyte board with 2 x PCIe 2.0 slots. I have had no general problems overall. One night, I ran the (release) MonteCarloMultiGPU app in a tight script loop (to exercise both video cards under CUDA) and the system was fine the next morning, still obligingly churning out the answers.
Last night, I ran that loop in a console, and in addition, had the ‘nbody’ CUDA/OpenGL app running in a graphical window at the same time. When I checked this morning, the machine was totally unresponsive, nothing on the display (and couldn’t switch to console mode, ex. using Alt-Ctrl-F1 etc.) – I had to do a hard reset to get the system going again.
Would have running these two things at the same time have created a situation that might be expected to cause a system lockup? That is ok, but I’d like to know, so that I am not suspicious of faulty hardware.
fyi, I am using all top-quality components (Intel E8400 CPU at stock speed, G-Skill RAM, Antec SLI-certified power supply, etc.)