I believe I mentioned this before... I guess it wasnt here on the Ark Forums but your CPU provides minimal gains to your Ark Server. Ive had very old machines hosting ark servers that ran fantastic. Ive spent numerous hours hosting Ark servers since Ark has come out more than half of those hours were spent tweaking the engine. Several NON-Ark developers working with me to increase server performance.
It took hours upon hours of tinkering to achieve 450+FPS on an ark server. However it does put a much heavier load on your CPU and uses significantly more ram.
My highest achieved FPS on an empty ark server is 1248
My highest achieved working FPS for 47 people online is just over 400
All this talk about server affinity and server cores and highest CPU ghz, is mostly rubbish. Having a super epic cpu provides minimal gains. I would NOT recommend hosting many ark servers on the same pc. The player experience will quickly decline.