basically replacing my case with the hardware in the signature
so what would this distance be
if i mounted the fitting on top of the card
also is there an unused pci bracket above your card?
Oh, the MSI aero is perfect, because you don't have the DVI port in the bottom, that would interfere with a 80mm rad. And yes, there is an unused bracket, because ATX mobos usually don't have PCIE slots right under the I/O.
But that's where your mITX board shines with its higher 16x slot. In my case with the top bracket unused, the distance you asked for is still 40mm. With the higher PCIE slot you get 20mm in addition, or enough for a 80mm rad and the fittings like I have them in the bottom.