Re: just want to make sure there are no issues in swapping the Optiplex into a much larger case, like the cables may be short to reach connections, etc. the front panel cables are from new case that need to be connected to optiplex board. no issue of their length reaching microATX board. Psu relationship to board is possibly different depends on how psu is mounted in new case. Bottom mount psu may need 24/4 pin extension cables as the Dell psu is designed to be top mounted. Top mount psu has no issue for 24/4 pin cable length. sata power cable length may be okay if new case hdd bay is not too much further from psu than Dell case.  [IMAGE]  
I've found a ATX case I like to transplant my recently bought Optiplex  9020 4770-i7 MT into as part of a complete upgrade (have all of the necessary components, including the Harbin Kit), but the case is a full tower which I'd really prefer, because it has 2 front Drive Bays at the top & 3 cooling fans just below. Despite the YouTube guides I've seen, I just want to make sure there are no issues in swapping the Optiplex into a much larger case, like the cables may be short to reach connections, etc., since even the new ATX mid-tower cases for transplants seem to be larger- I don't mind paying the extra price if it works, I just want to get this final element right. Thanks
Optiplex 9020 4770-i7 Mini Tower Case Transplant to Larger ATX Full Tower Case