Sapphire HD 6770 FleX Edition
 

In the standard gaming tests, the HD 6770 delivered results indicative of its architecture. Overclocking the HD 6770 lead to measurable performance increases across the board for not a lot of time commitment. The HD 6770 FleX was able to push out a 11%+ improvement on the core clock to 945MHz and a 13%+ bump on the GDDR5 memory clock to 1374MHz - both substantial and worthy of the time commitment.

http://www.overclockersclub.com/revi...__hd6770_flex/