AMD Radeon HD 6850 1440SP Edition 's Advantages
Larger VRAM bandwidth (128.0GB/s vs 48.00GB/s)
800 additional rendering cores
AMD Radeon 550X 640SP 's Advantages
Released 5 years and 8 months late
Boost Clock1071MHz
More VRAM (4GB vs 1024GB)
Lower TDP (50W vs 151W)