Psu has same pinout (8/4 pin) although SFF uses TFX form factor psu while mt uses standard ATX format.  You need to buy a 3020 mt psu or any standard 24/4 pin psu + 24to8 pin adapter for 3020. note SFF case IO shield is probably stamped in case and not removable. After transplant SFF motherboard to mt case you may lose IO shield.  It is not a big deal, just rear ports may be exposed without shield.  MT and SFF IO shield are different. [IMAGE] 3020sff rear [IMAGE] 3020mt rear 3020 SFF tear down video
I am looking to swap the case on my Optiplex 3020 SFF but don't want to have to use adapters and stuff. I do not care about the looks as I just want to fit a full size GPU in it. I found a Dell Optiplex 3020 MT case on eBay and was wondering if I could just put everything from my sff into the Mt case. I am not sure if it has the same cables and stuffso if you could tell me if you know I would appreciate it. Thanks in advance!
Dell Optiplex 3020 sff to Mt case