The Radeon HD 6850 is AMD's sub US$200 entrant in the discrete graphics card market. We have two on the bench to compare, a reference sample from AMD, and the Asus EA6850 DirectCU, which is overclocked, has an adjustable core voltage, and is cooled using a direct-touch heatpipe heatsink. They turn out to be winners, especially the Asus.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips