there was 15-18 players. CPU - Intel Xeon E5-1650(6x3.2 GHz). But this is a virtual server, maybe cores was shared between some VMs. So anyway, I think it will be good to do some multi-thread optimization. With the new public server browser there are many players that want to play online.. a lot of players UPD: now again almost 100% CPU, 25-30 players on server.