Depends entirely on your goals. If you want to minimize cost, it mostly depends on your energy cost. If it is low it doesn’t matter since all CPUs will gladly

Depends entirely on your goals. If you want to minimize cost, it mostly depends on your energy cost. If it is low it doesn’t matter since all CPUs will gladly last 10 years or more. If it is high, go for the one with the least power usage overall (if 24/7 workload) or least idle power usage (if idling a lot). If you want to put it in your bedroom you also want one with not so much heat output probably since it will be easier to cool = quieter. If you need to do processing or Virtualization you want multiple cores. If you do IO intensive tasks you need lots of PCIe and probably high clock speeds … etc etc So what are you trying to optimize for?