We need a bit more information to help you.
What version of FOG are you using?
What version of FOS Linux (kernel) are you using?
If you manually register this target computer, setup a debug capture/deploy then pxe boot the device. After a few screens of text that you need to clear using the enter key, you will be dropped to a linux command prompt. At the FOS Linux command prompt key in
lspci -nn | grep -i netand post the results here.
Stay at the FOS Linux command prompt in case we need to have you type in a few more commands.
the fog is 1.4.4. but the kernel… atm i dont know. will check later. We had to urgently finish that machine (not from our hw pool), so for next detail I have to wait a bit, but will gather what you requested. S soon I come with info I hope.