I tried to find the lowest E4800 vmin, 1.32v LLC6, 59/48/50 around 1.18vmin but I didn't run for long, keep in mind I have a Supercool 12th gen + chiller at 14°C :
Around 10°C delta P-cores and E-cores.
Vmin at 1.205v, 60/48/52, same conditions than above except with ram at 4500, SA 1.4v, TX...