AMD Radeon HD 7770 GHz Edition 's Advantages
Lower TDP (80W vs 140W)
NVIDIA GeForce GTX 660 Rev. 2 's Advantages
Released 2 years and 7 months late
Boost Clock1032MHz
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (144.2GB/s vs 72.00GB/s)
320 additional rendering cores