ATI Radeon HD 2600 XT Mac Edition 's Advantages
Lower TDP (45W vs 65W)
NVIDIA GeForce GTX 645 OEM 's Advantages
Released 5 years and 2 months late
More VRAM (1024GB vs 256GB)
Larger VRAM bandwidth (64.00GB/s vs 25.60GB/s)
456 additional rendering cores