New NIC Drivers

[NiKiZe]

ok so pciid is 1d6a:d107 : http://pci-ids.ucw.cz/read/PC/1d6a/d107 "AQC107 NBase-T/IEEE 802.3bz Ethernet Controller [AQtion]"

Please provide the output from ifstat (especially the driver) and which binary you are using (the binary you are using when you get that output)
preferably using the "official" ones from http://boot.ipxe.org

But simply put there is no native drivers in iPXE for that nic, so if iPXE finds any nic at all it is either a different nic that it finds, or it is found using UNDI (or SNP if running in EFI mode) the UNDI/SNP stack is provided by firmware or NIC ROM. We can explain this more after having the information asked above.