NVIDIA GeForce GTX 660 And GTX 650 Push Kepler To Sub-$110 - SlashGear
GTX 660 Grand Theft Auto V benchmark with Intel Core i7-2700K @ 3.50GHz at Ultra Quality: 1080p, 1440p, Ultrawide, 4K Performance Benchmarks - GPUCheck United States / USA
EVGA GTX 660 Ti Superclocked Video Card Review - Overclockers