i had similar confusion regarding this bios and ET but i read a post several pages earlier that if you want to use 1.3VTT u have to set it at default first that is 1.2 then u can adjust cpu and mch ref according to your need then set the VTT back to 1.3, youll get correct value on ET, thx to that who posted it

Whenever i set PL9 it wont boot, whichever bios version i use so PL10 that is

i used burntest but my temps goes up to 80c so i just use orthos blend to check if its stable enough , VID is 1.1250

yeah i have similar issue with this S3 but i think its common i have no idea wether they fixed already with latest bios

asap