superninja12 :
https://seasonic.com/product/m12ii-620-evo/
the little * thingy
Damn, normally this mode would be called 0 db mode or something, silent mode doesnt mean fans stop working, even that graph doesnt exactly show it... so i really doubt it. There is no source with clear info if PSU has 0 db mode...
Btw what year is it? It has 5 years warranty. You could send it for a fix.