The size of coolers needed for passive cooling is significantly larger than most people realize. The ENDORFY Fera 5 Black, a 4-heatpipe 500g heat sink struggles to handle the 54W Ryzen 7 7840HS. "Fully passive so there is no noise whatsoever. It is suitable for everyday use. However, If you want to push it to the maximum you need to add the fan because it will overheat. CPU reaches 80C in 8 minutes under 100% OCCT stress test."
Source: reddit
