1.Update your GPU drivers and 3DMark.
2.Did you install the chipset and mobo drivers?
Just do step one, but if that doesn't improve performance, try the next steps. Don't update your BIOS unless the other steps didn't work, and you know what you're doing. Also, here's the link to the latest AMD drivers for Windows 8/7/Vista 64-bit.http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx