There is some website that will give you a list of CPU with hash rate nicehash is not accurate but it can give you an estimation.
Check this website to find other model and hashrate result
https://monerobenchmarks.info/I know about this webpage. But like I said, there are no hashrates for CryptonightR.
For what purposes you need it? For mining it is really low. If you want to catch some profit - you can try wallet mining with new shitcoins without pools
I was going to build myself a new PC and I am not sure what CPU to buy. I have limited budget and have to think about what CPU I will buy. Then I googled how much can I earn with a CPU, and I did not find any information regarding hashrates of CPUs