OMFG I think I finally fixed it, I stumbled upon the "write combining" feature in the advanced options in the monitor/video config window(you know the one you access by right clicking your desktop), so I tried disabling it as -to my knowledge- I always had it disabled with my old card, and I haven't come across these glitches any more. Yay! Thx for the help.
I can't believe I went through a format and several hours of anguish daily trying to fix it when it was this simple.

At least my PC is fast as hell now though.
