7900GTO performance loss :S:S

[LeAd_Poisoning]

At a 700/800 (core/mem) overclock i score about 6500 in 3dMark06 but if i increase my clocks to 710/825, i get a significant performance loss on my SM2.0 score by over 500 points. i doubt my graphics card is flicking between 2d and 3d clocks because of high temps under heavy load as i only load at 66, is this normal load for a 7900GTO? According to the forceware panel, i only just cross into the yellow warning temp area by a degree or so. My old 6800GT always ran flawlessly into the low 70's in the high yellow region with no issues

 

[Dan0512]

It's because the core gets too hot and lowers the core speeds probably during the forest test to the low power 3d clocks.

dan

 

[LeAd_Poisoning]

i idle at 45 degrees but this climbs to 48 when my cpu is under full load, so games run at about 66 degrees or so under full gfx/cpu load. What are your temps?

where was it in rivatuner where i can actively record the running clocks during load, so i can see if and when they drop to 2d and from the nvidia panel and a cross comparison, at what temps they do it?

 

[Dan0512]

Mine loads @ around 49°, my case is open and well ventilated though.

On Rivatuner, on the adapter tab, go to hardware monitoring.

dan

 

[Raptord]

try making the fan run a bit faster. I have it at 60% and temps go down by quite a lot, considering its only going 11% faster. You can get it to about 65% without hearing it.

 

[UglyChild]

I think your Mem cant keep up with the Core. Set it to 700/850. You should get better results then.