Question Pc wont turn on normally

[Derekapit]

At the start of the day I have difficulty on turning on my PC I have to turn on my UPS then wait 20-40min after that it turns on normally. I tried going to the pc store where I bought the pc but when they try to start my pc it starts normally. I tried different outlets in our house and directly connecting the PSU cable to the outlet also I tried using my neighbors outlet still no luck.

I've tried the paper clip test and the PSU is working fine and used a multimeter to test all the output voltage of the 24 pins. The output voltage is all correct
This is the images that I based my testing
https://www.google.com/url?sa=i&url=https://www.quora.com/What-are-the-standard-output-voltages-of-a-computer-s-power-supply-How-Why&psig=AOvVaw1cBdU58rrKM4VwfvHUO-f9&ust=1674562851619000&source=images&cd=vfe&ved=0CA0QjRxqFwoTCLD_2vHW3fwCFQAAAAAdAAAAABAD

Also the 6pins are fine with the output if 12V

And I replaced the CMOS battery with a new one

But when I connect it to my motherboard it wont start unless I wait for 20-40min then comeback to turn it on

When my pc turns on there's no other problem I use it 8-11hours per day for work
The only change in the BIOS settings is that I enabled my XMP profile for my RAM

SPECS
MOBO: Gigabyte B550M DS3H AC
CPU: RYZEN 5 5600G
RAM: RIPJAWS GSKILL 2X8GB 3200MHZ
GPU: ASUS GEFORCE GTX 1050TI 4GB
POWER SUPPLY: SILVERSTONE 500W STRIDER ESSENTIAL (SST-ST50F-ES230)
BOOT DRIVE: 128GB WALRAM 2.5 SSD
HARD DRIVES: 500GB ST3500413AS
1TB TOSHIBA MK1002TSKB
4 INTAKE FANS
1 EXAUST FAN

 

[rgd1101]

what the ups?
test without the ups?

 

[Derekapit]

a uninterruptible power supply used to keep the computer running whenever there's a power interruption

I tested plugging it in the wall outlet itself still no luck

 

[rgd1101]

was looking for brand and model. but ok.

anyway. try turning off fast boot in bios if it exist

 

[Derekapit]

I disabled the fast boot in bios same result