Thx all for answers.
That's RandomX for you, I'm guessing that you CPU are old 2nd gen intel core series? You should try out cryptonight-lite algorithm and cryptonight-heavy, you will need to do research on altcoins that's running on this Algorithm though, I can still remember Loki though
Several Xeon X series and Several Ryzen 4750 G
If you are using old Xeon CPU they are only good for the first old cryptonight algorithm, and I don't think there are still new altcoins using this algorithm today, Sumo koin and karbowanec still support the old cryptonight but the Ryzen 4750G is good for almost all cryptonight algorithms like heavy, lite, etc