Why do power converters on the motherboard overheat?

Question

Iron

Today I moved the SSD from the laptop to the PC, everything is as usual, I often do this.
At startup, the bios freezes, which was not there before. I reset the bios, moved the SATA to another connector - it worked.
I used the PC without load for 3 hours, then I decided to play. After 10 minutes of playing - the PC turned off. I touched the voltage converters (those to the left of the CPU), they are so hot that you can’t touch them with your finger. I touched the radiator of the south bridge - the temperature is tolerable (45 degrees), the north bridge - a little colder (about 40).
I took the motherboard exactly a year ago. Model ASUS M5A78L-MLX3.
What could have caused at least one SATA connector to fail/fail and the converters to overheat? Mother is dying?

Temperature monitoring without load

Answer 1

KZ somewhere. Probably.