"The nForce2 chipset has been on the market for just under a year. The version under scrutiny today, which boasts the suffix "Ultra 400," is a little more powerful than before and, in addition, supports all FSB clock rates, starting with 100 MHz for the Duron right up to 200 MHz for the Barton core. The FSB operates in the dual data rate mode, which effectively doubles the transfer rate and therefore explains its name - Ultra 400."
Boards compared are:
- Abit NF7-S (rev 2)
- AOpen AK79D-400Max
- Asus A7N8X 2.0 Deluxe
- DFI LanParty NFII Ultra
- Epox EP-8RDA3+
- Gigabyte GA-7NNXP
- Leadtek K7NCR18D Pro 2
- MSI K7N2 Delta
- Shuttle Spacewalker AN35N-Ultra
- Soltek SL75-FRN2
. . . along with Shuttle's small-form-factor: Spacewalker XPC-SN45G
See the article at Tomshardware.com