So, randomly.. just out of the blue my computer can suddenly become slow. Now, it is EXTREMELY slow, whether on games or using the desktop - just complete lag...

I thought my GPU could be a problem so 2-3weeks ago i sent off my gpu for RMA, came back with no fault [as seen in the first pic(first link)]

http://tinypic.com/view.php?pic=72xbx3&s=7

Yesterday it was fine, now.. it's like using an integrated graphics chipset as my mastercard...
This always happens... sometimes slow, sometimes normal..

http://www.youtube.com/watch?v=mjM3BIEumrk

gpu doesn't want to go over 55% and cpu is at 100%

http://tinypic.com/view.php?pic=bh0kmc&s=7

I don't blame the game because after the 1.1 patch the optimisation fix did the trick...
I'm blaming my computer....

i5-2500 @ 3.3Ghz
12GB DDR3 @ 1333
GTX 570 1.25GB
XFX 850WSilver
Liquid Cooling
Windows 7 64bit

anyone have any clues?

wouldnt mind if someone wanted to teamviewer to check out PC to see if anything is bugging it.

As you can see.. when its slow.. its SLOW...

its on any game.. e.g. battlefield 3

when PC is fine - everything Ultra @ 1600x900 with 45-60fps
when PC is slow - everything low @ 1600x900 with 10-25fps

Have you checked temps? Maybe "slow" just means heated. Post hwmonitor pic when a game is "slow" or after you have been playing a demanding game for a while

If anyone bothered to read all of what I wrote, then thank you for taking time to do so even if there is nothing you can suggest.

King Regards,
Jared.