AMD Radeon 550X 640SP 's Advantages
Released 2 years and 8 months late
Boost Clock has increased by 4% (1071MHz vs 1030MHz)
More VRAM (4GB vs 2GB)
Lower TDP (50W vs 180W)
AMD Radeon R9 370X 's Advantages
Larger VRAM bandwidth (179.2GB/s vs 48.00GB/s)
640 additional rendering cores