fwiw here (15v4 + coreboot + SeaBIOS, running GNOME with tilix, two instances of firefox, and dosbox)
pch_skylake-virtual-0
Adapter: Virtual device
temp1: +34.5°C
I don’t think I ever got it above 40 degrees.
Edit: oh, I got it to +48 while compiling a C++ project with -j4 while running all the other things