There are quite a few great projects here based on the idea of an "upside down" video card and a motherboard to the back of it. It strikes me the recent crop (since Broadwell at least) of NUC motherboards would be much better suited for this -- the M.2 slot provides for a PCI-E x4 slot via a riser (and this format requires a riser anyways) which is enough. At 102x102 they are a great fit to the PCI-E card which is of similar height and the PCI card is 170mm long or so which means a 70x100mm 2.5" HDD is a great fit. The whole thing could be powered off the Dell DA-2 as the NUC needs a 12-19V input. Cabling it wouldn't be too hard as I seem to remember a 8 pin PCI-E to two 6 pin PCI-E splitter fits the DA-2 and there are PCI-E 6 pin to 5.5mm/2.5mm cables as well (for mining). At 220W , you could feed 75W to the PCI-E riser, 75W to a 6 pin and have enough power left for anything but the Skull Canyon.
I suspect the whole thing would be below 2L or even less.
I suspect the whole thing would be below 2L or even less.
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