The Celeron 2 will work in the BM6 if it is the cb0 stepping or earlier model (1.5 volt core voltage). The later cc0 stepping Celeron (1.7 volt core) requires a jumper on the BM6 motherboard socket (AH4 to X4) pins to work. Latest bios flash is also required. There are other tricks available to get around the 0.2 volt ABIT voltage bump limit if required to overclock to the 100 MHz bus. Just do a search for BM6.