AMD Radeon 550X Mobile 's Advantages
Released 5 years and 6 months late
Boost Clock1287MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (48.00GB/s vs 28.80GB/s)
256 additional rendering cores
NVIDIA GeForce GT 645M 's Advantages
Lower TDP (32W vs 50W)