I recently replaced my Phenom II x4 945 (3.0GHz) with a Phenom II x4 975 (3.6GHz).

The computer is running great, but video (GeForce GTX650 -- miniHDMI->HDMI) is not waking after sleep. Without video, I am even unsure whether the computer has woken as well.

I am going to try and downgrade/restore the BIOS (1.60/1.70) to see if anything improves.

If anyone knows what else I can try to solve this, it would be most appreciated.

Cheers.