I have the same problem, no audio no lan.

Mobo: ASUS M2N-E
Chipset: NForce 570 Ultra MCP
Audio: ADI 1988 8-channel High Definition Audio CODEC (I THOUGHT IT WAS ALC850!)
LAN: NVIDIA nForce® 570 Ultra™ MCP built-in Gigabit MAC with external Marvell PHY

According to below site, audio was previously called Azalia.

http://usa.asus.com/products.aspx?l1=3&l2=101&l3=308&l4=0&model=1181&m odelmenu=1

And this is a more technical page, a comparison with the SLI version.

http://www.asus.com/products_compare_show.aspx?array_model=1266,1181