NVIDIA GeForce GTX 680M 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (115.2GB/s vs 14.40GB/s)
1024 additional rendering cores
AMD Radeon R5 M330 's Advantages
Released 2 years and 11 months late
Boost Clock has increased by 36% (1030MHz vs 758MHz)
Lower TDP (18W vs 100W)