ATI Radeon HD 5670 's Advantages
Lower TDP (64W vs 150W)
AMD Radeon R9 270 1024SP 's Advantages
Released 5 years and 2 months late
Boost Clock925MHz
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (153.6GB/s vs 64.00GB/s)
624 additional rendering cores