I have in bios cpu core ratio "per core"and core ratio limit on "auto"; that seems to give me the default intel multipliers 44-44-43-42. I did not tested with prime, just with xtu, and I use the benchmark from it, it gives me higher temps than the xtu stress test. If I run prime I'm sure I'll get over 80, I only have a cooler master 212 evo (air cooler)
If you find a lower stable voltage or some other helpful settings please share with us
