i have a ASUS GTX 580 DCII, my GPUZ says 25.0 Gtexel FillRate and 50.0 GPixel FillRate. from other pictures and benchmarks and comparisons from hwcompare.com.....GTX 580 is supposed to be 37.1 Gtexel and 49.4 GPixel....
i'm currently using 310 Drivers and i also rolled back to 296 doing a complete reinstall including driver sweep in safe mode etcetc.. still same thing on GPUZ
i havent seen a performance issue in-game...BF3 still runs at 60fps on max settings, diablo 3 runs at 200 etc....and overclocks dont work using msi afterburner...just resets when i go play a game...
Build, Core i7 3770k 8GB Corsair Veng western dig blue 500gb 650W PSU asus p8h61(temp) also using 2 8 pins for power on GPU
it is strange...check in nvidia control pannel that the card set to performance. one out monitor. turn off all power savings and see if anything changes.
I changed the PCI express power link to no power savings, already had the card set to prefer maximum performance, etc and still nothing also did single performance monitor