Case fan starts spinning at 2000rpm when I lock my PC? Doesn't stop until I unlock it
I recently changed my AIO pump, which was a process involving....
- Resetting my BIOS fan settings to default to diagnose the issue, and
- Removing some plugs to my Corsair Commander (new AIO fans plug direct to MoBo)(so less fans are drawing power from the commander).
Now, one of the fans which was previously working fine, spins at over 2000RPM when I windows+L, and even when the screen turns black. It also happens between first turn on and until I unlock my PC. It never did this in the past 5 years I've had it.
For reference my CPU stays at around 30-50c. MoBo is a rog strix b450 f
I assume I have changed something in the BIOS. Would anyone know what this is, so I can change it back? I know each BIOS is different... but what wording should I look for? Nothing stands out... :/