This machine has Broadcom NICs.
There is one of these in the BL Sustaining Engineering lab.
Windows 2008 simply requires a WinPE and NIC driver (this is common in OS provisioning, 2003 on newest hardware tends to require more drivers).
Broadcom provides a combined 2008 and 2003 driver that should theoretically work for both. For WinPE, use the RIS drivers.
We suspect that the x3850 and x3650 use the same drivers.
[more to come, testing this platform today]