My board had some type of chipset problem but not with the NIC.
As I noted these are apparently made by Foxconn, who OEM's boards for Apple, Dell and who knows who else. The replacement board is working well and I haven't had any more problems with it. One of the main reasons I bought it, at the time, was because it has a T.I. firewire chipset in it and that is a must for most firewire connected recording gear. I have a Q6600 CPU in mine. I have a Dell Dimension E510 desktop that also has a Dell custom Foxconn motherboard and no problems with the E510 motherboard (and we haven't seen many motherboard problems with the Dimension E510/5150 models (both are identical) on the Dell users forum - but we have had tons of power supply failures on these models).