AMD Radeon HD 8990 OEM 's Advantages
Released 2 years and 7 months late
Boost Clock1000MHz
More VRAM (3GB vs 1024GB)
Larger VRAM bandwidth (288.0GB/s vs 28.80GB/s)
2000 additional rendering cores
NVIDIA GeForce GT 420 OEM 's Advantages
Lower TDP (50W vs 375W)