The fans are louder in v3.9.0 or run more often in v3.9.0.
Description/Explanation of Issue
The GPU fans on the Hog 4 console are more noticeable in v3.9.0 because they are activated at a lower temperature threshold which means that they are on for shorter periods of time but turn on/off more frequently.
The GPU fans' threshold has been adjusted in v3.10.0. It should run less frequently.