thanks everyone....
@chugi:
tell me something bro, if my clock was too high, then my pc would fail to start up, wouldn't it? cuz my pc starts up perfectly fine, and everything runs ok, except when i run 3dmark06...and there are artifacts, but the video also disappears and changes colors....and i havent oc'd the graphics card at all.....right now im running at stock speeds and everything is fine...