Optiplex 9020 MT Motherboard Size?

It will require an adapter because the PINOUT for the power supply is non standard.  Most EPS12V 24 pin power supplies like the CS750M from corsair will work with the adapter.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139061

Dell OptiPlex 3020 PSU Main Power 24-Pin to 8-Pin Adapter Cable 30cm

Suitable for Dell OptiPlex 3020 / 7020 / 9020 / T1700

3   Black = Ground                   (Same as 24 pin)
2  White = 12 volt                     (Same as 24 pin)
1 Green = Power On                (Same as 24 pin)
1  Gray = Power Good              (Same as 24 pin)
1  PURPLE = 12 Volt Standby  (Taken from Molex)

http://www.moddiy.com/products/Dell-OptiPlex-3020-PSU-Main-Power-24%252dPin-to-8%252dPin-Adapter-Cable-%2830cm%29.html

Thanks for the suggestion. It's nice to know that the adapter exists, but what I really want to know is what the mobo form factor is. I've read that it's Micro-ATX, but I just want to clarify.