do you have "Everest", I think I'm spelling that right, I could be wrong, I thought DXDIAG would tell me the MoBo model but I was mistaken on that,
Lavalys - Comprehensive IT Security and Management
I think the eval version is free, but if you have the full version it will tell you everything about your PC from Processor specs, to ram latency, to MoBo and bios info. I'll look up your PC model to see if I can find the MoBo manufacturer