This doesn't sound like a graphics card error but I will give you both diagnostics.
Depending on both your system and your drivers it could be either one.
If you know your system is more than minimum requirements (I'd say Within past 3-4 Generations on hardware) you should be fine on that.
If you have newer graphics card say the 6k (6,000) / 5k series try updating drivers to the 11.10 Preview 3 drivers. http://support.amd.com/us/kbarticles/Pages/GPU124AMDCat1110PreDriverV3.aspx
Those fixed most everything for me.
The install might have corrupted, if so a clean reinstall would clean it.
Hope I could help!