I undervolted through my motherboard bios. I am using a Gigabyte z790 board. If you don’t want to mess with BIOS you can always use Intel XTU. The program does make it easier to mess around but I always like doing it through the bios. Trying to avoid any apps if I can. My advise when playing around with voltage. Start small like start at say -30 or -40 Mv undervolt on cores and run a quick cinebench 24 multi core thermal throttle test. If cinebench doesn’t crash go down 5 or 10 mv test again and so forth. First do the cores. And then do the ring. When I originally did mine on stress test I could get it to -80 MV cores and -50 ring stable but then when I started gaming like cyberpunk and Hogwarts legacy would crash in 2 hrs gaming sessions so I went down to -40 MV on both and since then no crashes whatsoever. I am running a phanteks g500a air flow case with 6 140mm fans. The 420aio is at the front blocking a lot of incoming airflow but it’s still really staying cool in there. Normal gaming temps for cpu around 45-55 max and GPU goes around 65-70 max. Both cpu and GPU are undervolted and I actually gained performance by undervolting them both so I think it’s a must to undervolt the 14th Gen CPU for sure. Good luck playing around with it.