Nvidia shook up the enthusiast GPU market last month when it launched its most affordable Kepler offering yet. At $299, the GeForce GTX 660 Ti was $100 cheaper than the GTX 670, while being just 13% slower. Likewise, the GTX 660 Ti was faster and more power efficient than the competing Radeon HD 7870, despite matching it on price.

Ever eager to keep AMD on its toes, Nvidia continues its push into the mid-range market with a Kepler-based card that is expected to retail for about $230 -- right in-between AMD's Radeon HD 7850 and 7870. The GTX 660 is based on the new 28nm GK106 that nonetheless keeps all the key innovations introduced by the GTX 680.