NVIDIA GeForce GT 420M 's Advantages
Lower TDP (23W vs 50W)
NVIDIA GeForce GT 750M 's Advantages
Released 2 years and 4 months late
Boost Clock967MHz
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (64.19GB/s vs 25.60GB/s)
288 additional rendering cores