AMD Radeon HD 7970 X2 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (264.0GB/s vs 144.2GB/s)
1280 additional rendering cores
NVIDIA GeForce GTX 650 Ti Boost 's Advantages
Released 7 months late
Boost Clock1032MHz
Lower TDP (134W vs 500W)