AMD Radeon RX 640 Mobile 's Advantages
Released 7 years and 4 months late
Boost Clock1218MHz
More VRAM (2GB vs 1GB)
160 additional rendering cores
AMD Radeon HD 7690M XT Rebrand 's Advantages
Larger VRAM bandwidth (51.20GB/s vs 48.00GB/s)
Lower TDP (25W vs 50W)