I'm testing on a brand new DX79SI(W7prof./64bit) using Nvidia CUDA enabled grafics devices and get system freezes.
My app runs fine without using CUDA, but when I active CUDA the system freezes after a short random time (0.x - 2sec).
Today I've tested also 296.10, also with negative result. However when I plug the card to a x8 slot it works, but this is not intended. In every x16 slot the GPU freezes the pc.
The mainboard pci spec. is 3.0 and the card has got 2.0. Probably this is not compatible.
The current BIOS is 430.
It seems to be solved with new BIOS version 453.
I've tried with a GTX460 and a brand new GTX560.
Strange! I'm supporting myself...