Mb's manual says:
Lan - NVIDIA nForce 430 MCP built-in Gigabit MAC with external Attansic PHY.
This MB has a USB Wifi as well i couldn't make it work either - but i don't need it i've only tried another way to get internet work.
The forcedeth i've tried is the one which has come with the original SUSE 10.1 dvd. I don't know if there's a newer version of it.
I'm new to linux, and very happy that i've found someone who helps this much