Identifying form factor

Ok, I need help finding what motherboard will fit in a case. I was given a Dell Optiplex GX240 (vertical tower) with a few working, and a few broken parts. The motherboard and processor, are two broken parts. I know a little about the hardware side of computers, at least enough to put one together (not like that shit's hard), but I don't know form factors. The broken motherboard in the thing is a '62YVH REV A00'. I've searched for that and the computer's model every which way I can think of and I can't find the info I need. Sorry if this seems obvious to a lot of people, but I guess it's that much easier to answer. :)

Thanks a lot.

lol if its a new computer theres no wai its at. at died with spandex.