And between the time GTX 570 was not lagging during gaming
... and when the GTX 570 started lagging - only the CPU cooler got changed? Nothing else changed?
I was lagging already when I reassembled the pc back together, I had a few BSOD and when I loaded it gave me the "Windows Error," also the whole screen slowly disappears like a white line coming down to clean up the words.
Yeah, it's only when I installed the CPU cooler, replacing the Coolermaster 212+ and the GTX 570 is new, got it last week, replaced the GTX 460.