AMD Radeon RX 640 Mobile 's Advantages
Released 7 years and 4 months late
Boost Clock has increased by 52% (1218MHz vs 800MHz)
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (48.00GB/s vs 14.40GB/s)
480 additional rendering cores
AMD Radeon HD 7470M 's Advantages
Lower TDP (25W vs 50W)