I found perfect board for 3600: GIGABYTE B450M-S2H / 35 C° idle @ 0.25 Volts with ALL cores asleep with stock cooler (and yes Linux works perfectly too) : r/Amd
Best B450 Motherboard for Ryzen 5 3600 Review Guide 2021
Gigabyte B450M S2H V2 - Motherboard Gigabyte on LDLC
ADMI CPU Motherboard Bundle: AMD Ryzen 5 3600 6 cores, 4.2GHz boost, Gigabyte B450M-S2H Motherboard, No RAM- Buy Online in Bosnia and Herzegovina at Desertcart - 151953725.
SOLVED] - B450M PRO-VDH Max Compatability with gen 3 Ryzen CPU | Tom's Hardware Forum
Can you use Ryzen 5 3600 on a Gigabyte B450M S2H DDR4 motherboard? - Quora