AMD Radeon R9 280 's Advantages
Released 1 years and 7 months late
Boost Clock has increased by 5% (933MHz vs 888MHz)
More VRAM (3GB vs 1536GB)
Larger VRAM bandwidth (240.0GB/s vs 134.4GB/s)
640 additional rendering cores
NVIDIA GeForce GTX 660 OEM 's Advantages
Lower TDP (130W vs 200W)