I am in the process of updating my system. I have 2 5870's that I am planning on crossfiring, but I also have 2x 4870's from my old setup. Is it possible to Tri or quad fire these? Would there be any performance increase?
ASUS crosshair iv formula
2x Sapphire 5870 (cypress xt) Pci-e 2.0 x16
4x 1gb DDR3 1800
AMD phenom 2 x6 1090t
Old Video cards:
2x Asus dark knight 1gb 4870's Pci-e 2.0 x16
Macronix is correct. A Radeon HD 4870 can only be crossfired with a 4830, 4850, 4870 or 4890. You're just going to have to have 2 awesome gaming systems instead of one. Personally, I'm just blown away by my Radeon HD 4870 1GB Quad-Crossfire setup. It's the most incredible thing I've ever seen!