This mb is not a VIA mb.... it's a DFI motherboard with VIA chipset. Probably a PM12-TC or PM12-TL but without a bios id string, I cannot say for sure. You need to look and tell us:
or look at the actual mother board to see. And state whether it's retail boxed motherboard or OEM. If OEM, please state what pc brand and model it came installed in.