MSI GeForce 6800 graphics card
 

Overclocking the MSI GeForce 6800 yielded some very interesting results. From a stock clock speed of 325MHz and stock memory speed of 700MHz, we were able to overclock the card to a clock speed of 376MHz and memory speed of 798MHz. This is a 51MHz increase in core speed and 98MHz in memory speed. By all accounts this is a very good overclock considering the card's single-slot design and relatively quiet operation.

http://www.vr-zone.com/?i=1208&s=1