AMD Radeon HD 8870M 's Advantages
Boost Clock has increased by 8% (775MHz vs 715MHz)
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (72.00GB/s vs 64.00GB/s)
256 additional rendering cores
AMD Radeon R7 M260X 's Advantages
Released 2 years and 8 months late