Only cards I could compare. I'm sure those of you with HD5770s wonder how these two cards compare in an over clocked system. I want to eventually OC the 6850 to at least 1GHZ on the core. Limited voltage control software right now. System DFI X58 JR with I7firstname.lastname@example.org GHZ 6 GB of G. Skill DDR3 PC3 12800 Cards Single Sapphire HD5770 flashed to ASUS TOP HD5770 Single XFX HD6850 Flat view Side View Synthetic Benchmarks Driver 10.10c, Heaven, Vantage P, 3dMark2006 HD5770 HD6850 I'm sure I'll be able to hit 1GHZ on the core of the HD6850 as soon as some voltage control and higher clocks become possible with MSI Afterburner or SaphireTech Trix.