Hey, just got into undervolting on my MSI Katana with an i7-14650HX. Running Arch with intel-undervolt. Took a few hours tonight to find stable values.
BIOS boots fine at -170mV core, and then I use intel-undervolt to push further post-boot. Current daily config is -180mV core / -120mV cache which has been stable under s-tui stress tests for 10+ minutes with zero MCEs.
For what it's worth, -190mV core / -160mV cache also worked and was stable under basic stress tests, but it would occasionally hang on load transitions so I backed off. Only saw actual MCEs at -195mV+ on core.
Prime95 Small FFTs is a different story — that wants closer to -170mV core with basically no cache offset before it starts complaining. But I figure no real workload hits like Prime95 so I'm comfortable with -180/-120 for daily use.
Getting 4.3GHz all-core P-cores and 3.5GHz E-cores sustained under load, up from about 3.8GHz P-core stock. Temps sit around 85-87°C under full load.
Is this a good result for a 14650HX or should I keep tuning? Also wondering if it's worth touching System Agent or Analog I/O at all.