What Model (MT, SFF, Etc.) is it. Optiplex 3010

LOOKs DEEP (but this is a 2D screen not 3D)
and has 450watt PSU , not Dells I bet but is full sized ATX PSU, sure is.

the dell service manuals  shows you photos of of all versions,  MT do uSFF and AIO if sold.

best is to read the manuals  

or on same link about tell dell your service tag.  bingo.

or on your main page there, see this ,(THE VISUAL  GUIDE) clear as day good photos of all 3.

or the J brackets (PCI-e hockey stick brakets) MT = 120mm 4.7" tall called FULL height cards.