AMD Radeon HD 7870 XT 's Advantages
Boost Clock has increased by 10% (975MHz vs 888MHz)
More VRAM (2GB vs 1536GB)
Larger VRAM bandwidth (192.0GB/s vs 134.4GB/s)
384 additional rendering cores
NVIDIA GeForce GTX 660 OEM 's Advantages
Lower TDP (130W vs 185W)