NVIDIA GeForce GTX 660 OEM 's Advantages
Boost Clock has increased by 1% (888MHz vs 876MHz)
Lower TDP (130W vs 250W)
NVIDIA GeForce GTX TITAN 's Advantages
Released 6 months late
More VRAM (6GB vs 1GB)
Larger VRAM bandwidth (288.4GB/s vs 134.4GB/s)
1536 additional rendering cores