ATI Radeon HD 5850 's Advantages
288 additional rendering cores
NVIDIA GeForce GTX 660 OEM 's Advantages
Released 2 years and 11 months late
Boost Clock888MHz
More VRAM (1536GB vs 1024GB)
Larger VRAM bandwidth (134.4GB/s vs 128.0GB/s)
Lower TDP (130W vs 151W)