Random shutdowns

Hello,

My BIOS is latest version and there is no any heat issue.

Sometimes my Hackintosh shutdowns ever day few times and when it happen i cannot turn on again. (Or i have to power cable down and up)

After 2-3 minutes it starts automatically and this problem causes the bios cmos reset.

Any idea?

GIGABYTE Z390I AORUS PRO WIFI ° 16 GB DDR4 3000Mhz ° Intel i5-9600K ° Broadcom PCI-EX BCM94360CD BT Adapter ° WD 500 GB Blue M2VM SSD ° Intel HD 630 IGPU ° Dell Ultrasharp 27Q20E