low unigine score for 7950?

[RubixThing]

Hi all, I recently bought an ASUS 7950 3gb directcuII v2. overclocked it to 1100/1350 (mhz) from the stock 900/1250 (mhz). Using the 12.11 beta drivers I only achieved 1605 on Unigine, with tessellation on extreme and 4 times anisotropy (no AA) at 1920x1080

other specs;
16gb corsair vengeance
asrock extreme 6 z77
i5 2500k at 4ghz
650w psu

Any help would be appreciated

 

[RubixThing]

Thanks, under those settings I achieved 2028