ASUS EAH6850 DirectCU OC Edition
 

With a name that includes Overclocked Edition you have to believe that ASUS took the time to make sure the card overclocked well. And it did. With the large DirectCU dual heat pipe based heat sink, ASUS has equipped the card with better than stock cooling to allow for some spirited overclocking. I was able to overclock the core by almost 25% and the memory 18% (on this card in particular) by using ASUS's Smart Doctor utility to reach the final clock speeds of 983/1184Mhz.

http://www.overclockersclub.com/revi...6850_directcu/