AMD Radeon R9 M290X 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (153.6GB/s vs 36.00GB/s)
896 additional rendering cores
AMD Radeon 530X Mobile 's Advantages
Released 3 years and 3 months late
Boost Clock has increased by 14% (1024MHz vs 900MHz)
Lower TDP (50W vs 100W)