Have got some server hardware: One i use for games @ 18c36t 3,2Ghz 128Gb RAM (GTX970 so GPU processing is a no-go i assume) the other similar, but will have 256Gb. What’s best for these?

i’m only starting out and don’t understand the terms and measurements yet, but i am in the process and preparing the softwares to try. i would like to focus around the best options available to me.

Thanks