AMD Radeon HD 7990 's Advantages
Released 2 years and 1 months late
Boost Clock1000MHz
More VRAM (3GB vs 1536GB)
Larger VRAM bandwidth (288.0GB/s vs 164.0GB/s)
1536 additional rendering cores
NVIDIA GeForce GTX 590 's Advantages
Lower TDP (365W vs 375W)