A gaming server is a dedicated server that has been exclusively configured to run multiplayer gaming software. The software usually allows players of a particular computer game to play with each other online. Depending on the popularity of the game, a dedicated gaming server can be very active and, as a result, costly.
If you have decided to start a gaming server, one of the first things you will need to do is find out exactly what you need. System requirements can vary dramatically. For example, some games have support for Linux servers, even if the games themselves do not run on Linux. You will also need to consider the type of hardware a game server will need. A typical gaming desktop may have a powerful graphics processor and large monitor, but a server needs no monitor at all and will need more RAM, CPU, and disk space than graphics processing.
If you plan on leasing a dedicated server from a hosting company, you should find out what their policies are and if they will even allow you to run a gaming server. Some hosts may have packages for pre-configured gaming servers, helping your games to run more efficiently.
Since your server will be dedicated to gaming, you can safely disable certain services that may take up valuable RAM and CPU cycles. The mail server, for example, does not need to run, and if your game does not require any type of database, you can also disable the database server.
Finally, make sure you have the time and resources to maintain the server. Like any server, it will have security issues and problems that need troubleshooting. Just because the server is for recreation does not mean that maintaining it will be any less work.