NVIDIA GeForce GTX 690 's Advantages
Boost Clock has increased by 16% (1019MHz vs 876MHz)
Lower TDP (300W vs 375W)
NVIDIA GeForce GTX TITAN Z 's Advantages
Released 2 years late
More VRAM (6GB vs 2GB)
Larger VRAM bandwidth (336.0GB/s vs 192.3GB/s)
1344 additional rendering cores