Looks nice. Why they don’t sell PCs with cooling like that? What are the downsides?
I would guess that the low surface area would lead to problems. At first it would cool very well because of the huge thermal mass, but once it reaches thermal equilibrium the cooling would be quite weak.
I’d also think moving your PC will rip your CPU right off the motherboard
The trick is not to move the PC, but rather the copper block, which just happens to have a PC attached to it.