My 26 core lenovo/xeon workstation is quieter than my T450s. The former is exactly the same noise level 100% of the time regardless of idle or compiling code. My thinkpad spins its fans up to a nice hum when compiling code.

Some rackmount server hardware is fairly quite these days too. Variable speed fan profiles and a cool room do wonders to keep the fan speeds fairly low. Probably the noisiest think in my rack at home these days is the Ethernet switch.