ATI Radeon HD 5870 Eyefinity 6 's Advantages
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (153.6GB/s vs 25.60GB/s)
1120 additional rendering cores
AMD Radeon HD 8570 OEM Rebrand 's Advantages
Released 3 years and 4 months late
Lower TDP (60W vs 228W)