Speaking with Japanese outlet 4Gamer, Sony Engineering Director Yasuhiro Ootori revealed that that the fan within the Playstation 5 can be optimized via firmware updates.
“Various games will be released in the future, and data on the APU’s (Accelerated Processing Unit) behaviour in each game will be collected. We have a plan to optimise the fan control based on this data.
PS5 has three temperature sensors on the main board to control the fan speed based on the internal temperature of the APU and the highest temperature of the three temperature sensors. These fan control parameters will also be updated via online updates.”