Fortunately, the CrossFire Edition chipset has an ace up its sleeve. Its north bridge is capable of interfacing with alternative south bridge chips, including those built by ULi. Asus has taken advantage of that capability with the A8R-MVP, a CrossFire-capable motherboard built with ULi's M1575 south bridge. The M1575 fills in many of the features missing from the SB450, and it shouldn't suffer from the I/O performance problems that afflict the SB450..



Link: The Tech Report