I've got two here, both with serials starting with 1004 (which makes them rev 1.1).
It's kinda strange that mine came with a serial cable, because I can't see a UART/COM Port in either Windows (device manager) or Ubuntu (using lspci and lsusb).
It's even stranger than the DB9 end of the cable is the wrong gender. RS232 should be male at the PC end.
This is all after
updating to the latest BIOS (which adds serial support).
devmgr.png [ 41.67 KiB | Viewed 739 times ]
I guess they're absent at a hardware level.