AMD Radeon RX 640 Mobile 's Advantages
Lower TDP (50W vs 145W)
AMD Radeon RX 6800M 's Advantages
Released 2 years late
Boost Clock has increased by 96% (2390MHz vs 1218MHz)
More VRAM (12GB vs 2GB)
Larger VRAM bandwidth (384.0GB/s vs 48.00GB/s)
1920 additional rendering cores