AMD Radeon R9 M290X 's Advantages
Released 2 years late
Boost Clock has increased by 64% (900MHz vs 550MHz)
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (153.6GB/s vs 14.40GB/s)
880 additional rendering cores
AMD Radeon HD 7550M 's Advantages
Lower TDP (14W vs 100W)