NVIDIA GeForce GTX 660 OEM 's Advantages
Lower TDP (130W vs 148W)
NVIDIA GeForce GTX 970 's Advantages
Released 2 years and 1 months late
Boost Clock has increased by 33% (1178MHz vs 888MHz)
More VRAM (4GB vs 1GB)
Larger VRAM bandwidth (224.4GB/s vs 134.4GB/s)
512 additional rendering cores