I am building a new computer for just basic office work using an Intel 12600k and an Asus prime z690 wifi D4 and I noticed the CPU was capped at 400 MHz no matter what. It turns on boots into windows and everything no problem just slow CPU performance. There has also been no crashes. I have tried an alternate power supply that I know works, done the CMOS reset and messed with power settings. No matter what I try the CPU core voltage won't go above 0.7 volts and it should be around 1.16 volts if I remember correctly. Tried a different power supply I know works and have the same result. At this point I am thinking it is either a bad CPU and/or Motherboard, which it just might be, but figured I would reach out and see if anyone might have a solution .