AMD Radeon R9 280X 's Advantages
Larger VRAM bandwidth (288.0GB/s vs 32.00GB/s)
1664 additional rendering cores
AMD Radeon R7 350X OEM 's Advantages
Released 1 years and 7 months late
Boost Clock has increased by 5% (1050MHz vs 1000MHz)
More VRAM (4GB vs 3GB)
Lower TDP (65W vs 250W)