Hi!
I let the nvidia installer to install everything it wants including physx, .net framework, etc... I don't think this is driver or software related, since the same video card works properly in the new mobo. At least I tested it for 10 hours, and by the old mobo it takes at most 2-3 hours to get a crash, driver restart, etc... It is certainly not pb related, the pb cannot cause for example a firefox crash, or a video card driver restart. I installed everything the exact same way by the two systems. I'll buy thermal paste, and check the cpu, I'll probably put the cooler on the new cpu and forget this old stuff.