ATI Radeon HD 4870 's Advantages
Larger VRAM bandwidth (115.2GB/s vs 36.80GB/s)
416 additional rendering cores
AMD Radeon R5 340 OEM 's Advantages
Released 6 years and 11 months late
Boost Clock780MHz
More VRAM (1024GB vs 512GB)
Lower TDP (65W vs 150W)