I’ve got a mobo with two PCI-e slots, one x4 and one x16.
Can I put my existing ATI card in the x4 slot, a 9800GT in the x16 slot, and just use the GPU in the 9800GT for computational purposes and continue to use the ATI card for display?
Any pitfalls? I’m a total newbie at CUDA, but what little I’ve read implies that there might be a performance gain using the 9800GT just for computation.
Well, there was one problem, which is that my mobo didn’t know how to select one out of two PCI-e video cards. Not a hard problem to solve tho’, I had a PCI Quadro 280 (?, pre-CUDA in any case) in my closet o’ stuff. It’s in there and working fine. When I installed the CUDA driver it explicitly said that this card would be ignored by the driver.
I installed the CUDA 2.1 stuff. But the driver does not seem to be working:
Thanks. This also explains why I can’t run the “nvidia” driver for the 280 card and use CUDA at the same time. I’m guessing it’s one or the other. So I have to use the slow and limited “nv” driver, which isn’t what I had in mind (but it’s working, I’m posting from the system set up this way).
So… While I can get the two cards to work, the fact that one is “legacy” nvidia and one is “new” nvidia means I can’t get it to work the way I want.
Just to help out the economy I may try to pick up an ATI PCI card and see how that flies. The open-source ATI driver is pretty good and this way I can sidestep this whole issue. I still like the idea of having one card for display, and one just for CUDA computational stuff. At this point I think it’s just because I’m stubborn…