Just installed 2 crossfired MSI R4870-MD1G cards mating with my Gigabyte X48 DQ6. Benchmarks are indicating 2x4870 are on par with one 5870. 2x4870 maybe 1-2% faster. I have always wanted to crossfire and here's everybody's chance with two 1GB 4870's going for around 250-270 dollars! Nice running Warhead at 8AA enthusist.