Re: [CryptoNight] CPU mining guide & coins that will get you a return
Which CPU?
I think I missed your reply to the thread. 
I'm not sure if I understand your question correctly. If you're trying to find out which CPU would be best then the Ryzen family of processors from AMD is the best for mining at the moment.
They are also releasing a new CPU which will be by far the the best one for mining: https://www.techradar.com/news/amd-ryzen-threadripper-2nd-generation
AMD Ryzen Threadripper 1950x ( 800-1000 $) 1525 H/s
AMD Ryzen 1700X ( 330 $) 725 H/s
is it profitable to make such investments in mining? I think not.
If there is a given processor, you can receive 15-20 dollars of additional income per month. And to buy this processor for the mining is unreasonable.
It's easier to look for cheap old server boards with 2 processors and mine on it.