New
#21
Waiting for an error to occur is very tedious. I like to run a program like Prime95 to see if I can speed up the process of getting to the error, if there is one. The nice thing about running a program like this is that you can 'push the button', go to bed, and check it in the morning.
You replaced RAM and a Video card, correct?
If you find no joy in tweaking the RAM settings then you may need to address the video card. But I never go in two directions at once. You can never know which fix solved it. I'd run through all the RAM tests first.