SF1000L PSU problem

[john-smith-5364]

hello!

i'm looking for some input regarding my Corsair SF1000L psu, because i'm worried it might not be working properly.

details:
- psu has been in use for a month
- noticed a weird noise coming from the psu a few days ago (origin seems to be the fan bearing area)
- psu fan turns on after 10-20 minutes of idle time after booting into windows
- manual says fan doesn't turn on below 400w power draw (doesn't say what temperature)
- maximum system wattage (according to pcpartpicker) is 395w
- psu fan only turns off after shutting down the system
- all temperature readings are constantly at their lows (not climbing at idle)
- system is stable

video (turn volume up):

- os: Microsoft Windows 11 Professional (x64) Build 22631.3880 (23H2)
- bios version: 19.05 (05/24/2024)
- pc specs: https://pcpartpicker.com/list/HXtZpB 
- psu is plugged into an APC UPS 1600VA BVX1600LI-GR

idle temperatures:
- motherboard: 44c
- mos: 40c
- cpu: 36c
- room: 28c

things i've tried so far:
- disable all power saving features in bios and windows
- balanced power plan with bios defaults
- enable all power saving features in bios and windows
- cpu stress test (cpu-z)
none of the above made any difference

is what i'm experiencing normal or is there something wrong with the psu?

thank you for reading!

[john-smith-5364]

solution: disabled xmp profile

my theory: enabling xmp profile silently modifies certain bios settings (which are set to auto) which leads to higher voltages and more heat being generated