It was designed for usage with ATI's CrossFire Multi GPU Technology, with both PCI Express slots running at x16 lanes each.

Reviews painted the Xpress 200 Crossfire as a board that could match nVidia's nForce 4 SLI.

Having all of the PCI Express lanes within the Northbridge claimed to be more efficient and less bottlenecking as compared to the nForce 4 16x SLI.

Originally, the SB450/SB460 was highly flawed in the USB design and lacking in cutting edge features as compared to nVidia's counterpart which resulted in low sales.

As a result, high expectations was placed on ATI to design a Southbridge that was on-par or greater than the ULI 1575.

As reference boards for Socket AM2 trickled out, many sites commented that ATI had an even footing against nVidia with great improvement in the SB600 southbridge.

It is based on a 130 nm fabrication process with dimensions 23 mm×23 mm and 549 pins FC BGA package,[5] and provides 10 USB, 1 ATA/133, and 4 SATA 3.0 Gbit/s interfaces.