Attention! The case i'm using is *NOT* made for ATX/SSI-EEB boards (there is a separate ATX version though, which only has ~7 slots instead of 15). This is an industrial pc chassis supposed to be used with PICMG setups, so by design there is *no space for a mainboard with CPU*. Instead there should be backplane (without CPU) with many PCIe slots and a PICMG 1.3 slot, where the CPUs sitting on a separate SBC that itself is "plugged in" just like the GPUs themselves ... The specs you have mentioned will *not* work with this kind of case !!
In fact i "abused" that case and put in a consumer intel i3 board with small footprint on top (!) of the GPUs, using low profile risers to connect the GPUs below. This setup is a lot cheaper than a PICMG backplane and a SBC CPU board. It's working nicely and was specifically built for slow hashes. It's got perfect airflow etc., *BUT* in fact building it was PITA and it took me several attempts to get everything right. Unless you are willing to spend a lot of time on all the details and cable fiddling, i wouldn't recommend it. I just needed a very short chassis because i can't put in deep rack cases, and this is only ~45cm deep.
epixoip recommended a Chenbro case, that *might* fit your requirements a lot better, but i'm not sure. it was a RM41300 i think.
In fact i "abused" that case and put in a consumer intel i3 board with small footprint on top (!) of the GPUs, using low profile risers to connect the GPUs below. This setup is a lot cheaper than a PICMG backplane and a SBC CPU board. It's working nicely and was specifically built for slow hashes. It's got perfect airflow etc., *BUT* in fact building it was PITA and it took me several attempts to get everything right. Unless you are willing to spend a lot of time on all the details and cable fiddling, i wouldn't recommend it. I just needed a very short chassis because i can't put in deep rack cases, and this is only ~45cm deep.
epixoip recommended a Chenbro case, that *might* fit your requirements a lot better, but i'm not sure. it was a RM41300 i think.