Originally Posted by LORD-eX-Bu
a virus could have very negative effects on performance... before you go nuts though you need to uninstall your previous drivers before you install the new ones.
FIXED! Thanks to everyone...
I checked the video card frequencies in nTune and 3dMark and it showed that the GPU was clocked at 0.0 Mhz, and memories at 0.0 Mhz. WTF. I rebooted into safe mode, unistalled the drivers and installed the newer available driver.
And now i'm back to my usual performance.
Thanks everyone for the help.