ATI Mobility Radeon HD 4670 's Advantages
Lower TDP (35W vs 100W)
AMD Radeon HD 8970M 's Advantages
Released 4 years and 4 months late
Boost Clock900MHz
More VRAM (4GB vs 512GB)
Larger VRAM bandwidth (153.6GB/s vs 25.60GB/s)
960 additional rendering cores