The whole COMPUTER is a RADIATOR! - Cooler Master Cooling-X 

Looks like a beast of a machine. Would love to run some rendering and gaming benchmarks on it :)

What about for 4k? Is it quiet?

run crysis?

Ok. Copper water blocks with aluminum passive radiators. Sounds like a disaster. Aren't you worried about galvanic corrosion over time? Why not make the water blocks from aluminum? It'll be cheaper than copper and you don't have to worry about galvanic corrosion. This issue has been known about for years and every manufacturer of water cooling products have experienced and overcome this issue.

The 4080 doesn't need watercooling in first place. The whole thing is pointless.