Your setup is powerful enough to hold about 150-180 players at once but the limiting factor is always gonna be your connection speed. At 12mbps upload you'd be able to hold about 30-40 players at any given time and start to see a little rubber banding here and there. On the other hand if you had for example.. 60mbps upload and download you'd easily be able to handle 150 players at once. At that time you'd be worrying about server load and not connection speeds.

Good luck with your server, hit me up with a PM I'd love to come check it out!

Peace,
atsmith

hmm well if this is a home desktop you could squeeze by with 20-30 players depending on the amount of memory you give it. I personally run all my servers off my dedicated servers. let me know if you have any questions. I would be glad to help as much as I can