NVIDIA GeForce GT 555M 's Advantages
Lower TDP (35W vs 100W)
AMD Radeon R9 M290X 's Advantages
Released 1 years and 10 months late
Boost Clock900MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (153.6GB/s vs 28.80GB/s)
1136 additional rendering cores