AMD Radeon R9 270 1024SP 's Advantages
Released 2 years and 6 months late
Larger VRAM bandwidth (153.6GB/s vs 144.2GB/s)
64 additional rendering cores
NVIDIA GeForce GTX 660 's Advantages
Boost Clock has increased by 12% (1032MHz vs 925MHz)
Lower TDP (140W vs 150W)