AMD Radeon HD 7770 GHz Edition 's Advantages
Lower TDP (80W vs 200W)
AMD Radeon R9 280 's Advantages
Released 2 years and 1 months late
Boost Clock933MHz
More VRAM (3GB vs 1GB)
Larger VRAM bandwidth (240.0GB/s vs 72.00GB/s)
1152 additional rendering cores