I hope someone can offer suggestions to help me figure out this issue. I also randomly have Windows Explorer crash too (the File Explorer, not the main Windows process), and I'm not sure if it is related. I have tried to run GPU testers but they say no GPU found. System is:
Window 7 (x64) build 7601
3.00 gigahertz AMD Phenom II X4 945
512 kilobyte primary memory cache
2048 kilobyte secondary memory cache
6144 kilobyte tertiary memory cache
Multi-core (4 total)
Board: ASUSTeK Computer INC. M4A78T-E Rev 1.xx
Serial Number: 107848400001468
Bus Clock: 200 megahertz
BIOS: American Megatrends Inc. 3406 08/20/2010
16 GB Ram
ASUS HD7790 Series [Display adapter], 2 GB RAM
Driver: 22.214.171.124, Date: Aug 30, 2013.
(I tried the latest drivers and the computer crashed all the time so I downgraded.)
Maybe it's getting kind of old, but I would like to know how to test what needs to be replaced.