https://wccftech.com/ps5-system-updates-control-fan-speed/

PS5 System updates will be able to dynamically adjust the console’s fan speed for better cooling.

Earlier this month, Sony aired its PS5 teardown video showing off the console’s internals, including its 45mm thick cooling fan. As covered earlier, this large fan is actually the reason for the size of the PS5. As pointed out by Sony’s engineering director, Yasuhiro Ootori, cooling has played an important role in the design of the console due to the high-frequency of the CPU and small die size.