Well, honestly I don´t know, but the measurements for sfx12v power supply with the 12vo intel standards, give these psus a 40mm fan on the side, so the whole psu would have a thickness of just 50mm which is more or less the same as the motherboard IO panel... giving the possibility to mount a very thick side radiator (unlikely, I guess) or some kind of vertical gpu with a non-standard cooling device which I´m not aware of, because that cooling device could go behind the pcb... using the extra room that psu could provide....... I don´t know, I´m completely speculating.