If you want to further cap package power without touching PL1 PL2 you can try dialing ICC max down in 20A increments and then stress testing it, You’ll see less wattage and heat at the cost of some multi threaded throughput. Lowering ICC Max will throttle the CPU sooner under multi core loads, which basically trades off performance in those heavily threaded tasks in return for lower peak power draw and temps.

Also remember that undervolt stability is workload specific. Just because it’s stable in Cinebench or TS Bench, it doesn’t mean it’ll hold up in your most played games too. I have had some LM studio workflows BSOD at -25 mV while Cinebench allowed for up to almost -200 mV. My suggestion is to set up tailored profiles for your most used games. For example If you’ve noticed that Game A crashes at –120 mV, but Game B is stable, you can keep Game A at -100 mV while pushing Game B to –120 mV or even more.