I currently have a HP Media Center that I am converting to a gaming/media rig. I bought it because it was the cheapest Dual Core i could find at the time. My question is, I'm planning on putting in a Antex 500W Smartpower 2.0 PSU a X1800XT and a PVC-150. I was wondering how I can tell if this stuff will fit in my case without actually measuring everything? I would buy a new case but while I am confident of putting new pars into my comp I am a little hesitant in transfering everything to a new case. any advice would be welcome