I can confirm this as an issue. I noticed immediately that performance on my crossfired 6950's was abysmal, even on medium settings, and that even with the Epilepsy filter disabled, the secondary card does not throttle up at all (i.e. Crossfire is completely non functional) while the primary card also runs at only 500MHz (instead of the usual 800MHz).
If you want to check your own cards, use GPUz from TechPowerUp. Just run it in the background, with the Sensors tab selected (make sure to tick the box for continuing to refresh the screen while it's running in the background) and then alt tab out to see what speeds it's been running at. Ignore the current speed though, that will generally drop when you alt tab, instead mouse over the red bar for the GPU Core Clock and the value it displays will be the one it was running at. If you have a second monitor though, naturally you can keep the window visible in that while you play.
http://www.techpowerup.com/gpuz/
I have a heavily overclocked i7 930, a pair of 2GB 6950's and 6GB of RAM, yet the game runs more poorly than Crysis did on my old Core 2 Duo/8800GT. Something is very wrong here.
03-31-2011, 05:00 PM
Threaded Mode