Certainly seems like I can keep my options open, such as putting the GPU under water, by getting the Classy. It's really unclear how, or if at all, the extra power phases help for OCing for ordinary folks though. Certainly one must be doing some custom water loop at least, before that headroom could be properly exploited.
Now I just hope I'll be able to run all the monitors I want to run off my Classy, I'm gonna be trying two chained video adapters. Might not even work... Will this be worth the power phases? Time will tell...
Meanwhile my parts all came in except for the GPU which according to Fedex I have to wait till Friday for. Which is complete horse manure, but I'll live.
Next step for me is to route some modular PSU wires.
I do have the D15 installed and yes, the wires for the fan are cutting it close on the PCIE3_1 slot, but... a card with a backplate means the wire won't be shorting anything. Hopefully it will fit okay...
It's definitely possible to configure the D15 in a vertical way which gives complete PCIe slot freedom. But it means pointing the fans with the airflow going downward. This blows warm air into the GPU so it doesnt help cool the GPU but wouldn't hurt it too much, the thing is I'd then be wanting to reverse the top 200mm fan into a top intake and then I'd have so much unbalanced airflow I'd want to swap the window panel for the mesh panel to turn the side into a passive exhaust. Plenty of airflow in this case though. Also, wow, D15 would not fit in an ordinary tower case, it's too tall!