I'm sure most of you are already aware of the existence of the Dan Case A4-SFX, and it probably doesn't need an introduction. But, just in case, here it is: https://www.dan-cases.com/
This case has room to mount a single dual-slot graphics card. SLI shouldn't even be a possibility, right? But, what if we took a card that only had IO on one slot, such as the new GTX 1080ti, and attacked a slim water block to it? Suddenly, it takes up only one slot, and you have room for another right next to it. https://www.ekwb.com/shop/ek-fc1080-gtx-ti-i-o-single-slot-bracket
Now, there are two graphics cards in that tiny case. So what? Mini-ITX motherboards are only built with one PCIe slot. Think again!
With a little modification, it should be possible to drill holes in the bottom of the Dan Case, attach some standoffs, then mount this PCIe splitter perfectly beneath the two cards. Boom! SLI on a Mini-ITX motherboard!
Of course, anyone could have done some googling and come to the same conclusions I have, so the real reason I'm making this Topic is to ask a few questions.
If we were first to ignore the physical, dimensional problems involved in modifying the Dan Case to mount a PCIe splitter, then also ignore the thermodynamic problems of having two powerful cards dumping heat into one tiny radiator, would a setup like this even work on the software side?
Would the benefit of having a second graphics card outweigh the cost of cutting the PCIe bandwidth to each card in half? Would the cards even function in SLI while they're both technically plugged into the same slot on the motherboard?
If someone who has more knowledge and experience were to tell my exactly why this wouldn't work, I would appreciate it.
Thanks