PowerColor PCS+ HD7970 vs Gainward GTX 680 Phantom Review @ HardwareHeaven.com
 

Today we update the battle between the 680 and 7970 by taking two of the most impressive models, both custom factory overclocked, and put them head to head in real world gameplay which includes Battlefield 3, Mass Effect 3 and Skyrim as well as media playback and GPU computing... enter the PowerColor HD 7970 PCS+ (Vortex 2) and Gainward GTX 680 Phantom.

http://www.hardwareheaven.com/review...roduction.html