To overclock today we are using the latest beta version of Sapphire’s TriXX tool , V4.6.2.
An overview of the card in Sapphire's TriXX.
There is quite a lot of overclocking headroom with this card. We managed to increase the core from 1,075mhz to 1,211mhz, translating to a 12.65% gain. The memory overclocked to 1,663mhz.
The overclock translates into a 300 point score increase in the latest version of 3DMark – the Fire Strike test. Still a little behind the reference clocked HD7850, but quite close.