AMD Radeon Pro Duo 's Advantages
Released 3 years and 8 months late
More VRAM (4GB vs 1536GB)
Larger VRAM bandwidth (512.0GB/s vs 134.4GB/s)
2944 additional rendering cores
NVIDIA GeForce GTX 660 OEM 's Advantages
Boost Clock888MHz
Lower TDP (130W vs 350W)