The answer is right there in the pic.
Asus P6T7 WS Supercomputer
2- antec 1200's
12GB Corsair Dominator GT 2000 8-8-8-24
Black manifold with inlet/outlets ties all blocks together nice rigid and compact plus no extra connectors between to possibly leak.
Just wide enough for single slot spacing
Odd 7th card just didn't want to co-operate so was left out.
Have to admit I reverse engineered it though from existing system of a friend of a friend
Been building wacky systems like these for 10yrs before I even heard of bitcoins
All cnc machined of course!
No I do not mine with things like this, way too much extra overhead but I just can't stop building crazy monsters for fun.