AMD Radeon HD 8870M 's Advantages
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (72.00GB/s vs 14.40GB/s)
320 additional rendering cores
AMD Radeon R5 M240 's Advantages
Released 1 years and 5 months late
Boost Clock has increased by 33% (1030MHz vs 775MHz)