I think something is off. That is quite a low score for such a nice card. It may not be the fastest thing ever, but it's still the HD line. 4xxx no less.
I'd update the chipset drivers
along with the video card drivers too, to latest. For video, use the latest from ATI's site, not Gigabyte's.
It's good practice to update everything you can find to latest. Drivers and software apps too.