NVIDIA GeForce GTX TITAN 's Advantages
Boost Clock has increased by 12% (876MHz vs 780MHz)
More VRAM (6GB vs 1GB)
Larger VRAM bandwidth (288.4GB/s vs 36.80GB/s)
2304 additional rendering cores
AMD Radeon R5 340 OEM 's Advantages
Released 2 years and 3 months late
Lower TDP (65W vs 250W)