Weight, cost, and it’s probably not effective for the long haul. The mass of a copper ingot like that will work like a heatsink, but it has a very low surface area for the energy it can absorb. So it’ll heat up to a point that is uncomfortable for the CPU, then fail to radiate that energy out to the air effectively.
As a test-bench temporary heatsink, this is actually kind of inspired. No fans, to fussy clips, just stack a copper brick on the CPU, run some benchmarks, and then turn it all off.
Weight, cost, and it’s probably not effective for the long haul. The mass of a copper ingot like that will work like a heatsink, but it has a very low surface area for the energy it can absorb. So it’ll heat up to a point that is uncomfortable for the CPU, then fail to radiate that energy out to the air effectively.
As a test-bench temporary heatsink, this is actually kind of inspired. No fans, to fussy clips, just stack a copper brick on the CPU, run some benchmarks, and then turn it all off.