You might be able to tell by the post at the computer startup, what board you have.. some say across the bottom, my CUSL2-C says across the bottom what it is for example.. hope that helps.. the mobo is most likely and AX6BC or something like that, but I am not too sure to say anything, good luck finding out, may have to just open the case and look for a model no. Aopen's are pretty good with designations, etc..