Feisty Fawn
Installed Ubuntu 7.04 (Feisty Fawn). Everything works. RAM/CPU detected and working. LAN auto-detected, sound fully functional, USB too. No problems.
Didn't tried other Ubuntu (Kubuntu, EDUbuntu...) versions.
Gutsy Gibbon
Using bios 0901 Installed Ubuntu 7.10 (Desktop) AMD64. CPU AMD AM2 X2 3800+ and AMD AM2 X2 5200+.
AMD64
Sound speaker output works ok.
Sound S/PDIF not tested
Sound input not tested
10/100 Mbit Lan autodetect works
1000 Mbit Lan untested
USB works ok
RS-232 serial port untested
IEEE-1284 parallell port untested
PATA DISK and DVD works and is fast
SATA DISK works and is fast
SLI not tested
Keyboard works OK
Mouse works OK