I see explorer making my CPU max out to 100%. Which I been seeing on Task Manager. But I did just try Counter-Strike Source that game I was speaking of, and it seemed to run fine, it did feel a bit sluggish... but that could have been the Process Explorer running in background... and when I ran game, it got a constant 50% usage on my CPU, so that didn't hurt it at all. Now I'm starting to wander if it is even the CPU. But when I did leave the game, I tried to open up Explorer, and it froze on it instantly. I don't see anything else going way up and down.
When I ran the Memtest in Bios the other day, it quoted a Single Channel... when infact the two sticks are duel channels, and my mother board supports duel channel. And it's been running fine, up untill several days ago. But I don't see how that could be the problem, as even if it wasn't running in Duel Channel, 2 gigs is still quite a bit of power.