AMD Radeon R9 M385 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (76.80GB/s vs 36.00GB/s)
512 additional rendering cores
AMD Radeon 530X Mobile 's Advantages
Released 1 years and 11 months late
Boost Clock has increased by 2% (1024MHz vs 1000MHz)