I just upgraded my GA-M57SLI-S4 motherboard with a AMD Phenom II 810 cpu and after XP installed the drivers and system bus my onboard LAN failed. Does anyone have an idea why? I have tried to release and reaquire the TCP/IP but it will not install. I suspect the new Bios has something to do with this, if you have an explanation or a idea how to fix this without using a work around please make a post here.