AMD Radeon HD 7970 GHz Edition 's Advantages
Boost Clock1050MHz
More VRAM (3GB vs 1GB)
Larger VRAM bandwidth (288.0GB/s vs 134.4GB/s)
1248 additional rendering cores
AMD Radeon HD 7720 OEM 's Advantages
Released 9 months late
Lower TDP (150W vs 300W)