The v7.1C version which can be found on the PC-Chips website uses the 964L southbridge, just like the v5.1a socket version. The v3.0C has got the 963L southbridge, like the v1.5a version. So i don't think the bios of the v7.1C will work.
On the website it is stated, that the v7.1C uses a Geode NX CPU, they typically use socket 462 (A) or they are soldered directly to the mainboard without socket.
The CPU on my M863G v3.0C is correctly recognized as XP-M 2400+, but the Windows setup always hangs at the start (Vista/7 with STOP 0x00000005 bluescreen, XP with blackscreen). I can boot a live Linux from the dvd-drive, but if i install Linux on the harddrive i get a Read DMA and invalid CHS sector 0 error on first boot. I already swapped the dvds, memory, harddrive, PATA-cables and psu, i also tried a PCI PATA controller (HighPoint Rocket133), i always get the same errors.
Memtest86+, Windows Memory Diagnostic and the samsung hdd tool ESTool are running for hours without error.