NVIDIA GeForce 8800 Ultra 's Advantages
Larger VRAM bandwidth (103.7GB/s vs 38.40GB/s)
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Released 4 years and 11 months late
More VRAM (1536GB vs 768GB)
16 additional rendering cores
Lower TDP (75W vs 171W)