I'm not in front of a computer but there was a link to Intel docs few pages ago in this thread @jwegman Or you can search on Intel support site for Technical Product Spec P4000M familydoes the P4308XXMFGN chasis hold standard SSI EEB boards? 12"x13"? Does it come with standard ATX power supplies or something else?
It has description / nomenclature for various power supply / fan configurations.
'M' Medium - can accommodate SSI EEB
'GN' I believe is 750W single hotswap power supply.