Many replace a PSU because it is the only part of a power 'system' they understand. It is called shotgunning - replace good parts until something works. The other alternative was to see that defect in minutes. Then only replace the one defective part. And learn why that defect exists. Tiers says little to nothing about PSU defects.
Surge is a word used to describe tens of completely different and unrelated defects. But again, most only use word association to 'know' something. That motherboard is reporting a defect (that exists constantly - even when your computer is working) that exists on DC voltages. That defect has zero relationships to what other are discussing - a surge on AC voltages.
Apparently you have chosen to shotgun. How do you know if a new PSU solved anything? Again, normal is for a defective supply to still boot and run a computer for months. Will a new PSU cure a symptom or solve a problem? Welcome to the two completely different diagnostic procedures. First finds a problem even before a computer crashes or is reported by the Asus software. Later is called shotgunning - keep replacing good parts until something works.
BTW, why do we fix things (not take it to the shop)? To learn even from our mistakes.