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)
448 additional rendering cores
AMD Radeon HD 6870 1600SP Edition 's Advantages
Released 7 months late
Lower TDP (175W vs 300W)