Assigning Servers To Single Cores.

So I have never assigned a server to 1 core before on a VPS. This honestly explains a lot of old server issues running 28+ players with no major errors/DDoS, yet lagging a lot/crashing with low prop limits/ no wire etc. So my question is for a VPS using windows. How would I assign a server to a single core to spread them out. Besides that and tick rate. Any other suggestions to keep a smooth server? Thanks

You would use the affinity startup command

/affinity 2

The number specifies the core. More on the subject here.

I am slightly confused by the core numbers the person said /affinity 2 means core #1 ?? I am using NFO so how would I number my 3 core?