NVIDIA GeForce GTX 660 OEM 's Advantages
Larger VRAM bandwidth (134.4GB/s vs 56.00GB/s)
640 additional rendering cores
AMD Radeon 550 's Advantages
Released 4 years and 8 months late
Boost Clock has increased by 33% (1183MHz vs 888MHz)
More VRAM (2GB vs 1GB)
Lower TDP (50W vs 130W)