@RL_Dane
Here's what I get from it all:
~] top -bn1 |grep -A9999 "^ *PID " |awk '{foo+=$9} END {print foo}'
24.9
~] nix-shell -p lm_sensors
[nix-shell:~]$ sensors |grep ^Package
Package id 0: +43.0°C (high = +100.0°C, crit = +100.0°C)
[nix-shell:~]$ grep -m1 ^model.name /proc/cpuinfo
model name : 12th Gen Intel(R) Core(TM) i5-1240P