Strange problem with 7950 GT

[dwell]

When cold boot my system (sig) I get over 6200 on 3DMark06, but if it's up a while (like 30 mins) the frame rates get cut in half and I only score around 3000. I can't get normal rates again unless I cold boot. The same goes for games. I get ~50-60fps outdoors in Oblivion but if the system gets in that state it drops to ~30.

No services or anything strange are running. Any idea?

 

[NikolaeVarius]

Probably overhearing

 

[40sTheme]

Yeah ^ QFT. Is your case well cooled? Mine is, and my 7950GT OCed to 7900GTX speeds never goes above 70C.

 

[dwell]

Ok. I clocked down to normal speed and let it sit and got consistent frame rates. I guess I will clock it down a lot until I get better cooling.

 

[dwell]

Damn, even clocked at default speeds this keeps happening. The GPU is around 50c idle, the MB is 39c, the CPU is 50c. The weird thing is if it happens and I reboot it still happens, but if I power off for a second than turn it back on right away the problem goes away.

Think it's still heat or something screwed with my system?

Edit: Monitoring everything with Rivatuner, even when slow the GPU/memory is normal 550/700 so it's not the drivers throttling the card. Jeeze this is driving me nuts.