NVIDIA GeForce GTX 780 6 GB 's Advantages
Boost Clock902MHz
Lower TDP (250W vs 275W)
AMD Radeon R9 390 's Advantages
Released 1 years and 9 months late
More VRAM (8GB vs 6GB)
Larger VRAM bandwidth (384.0GB/s vs 288.4GB/s)
256 additional rendering cores