What are the minimum system requirements to run a dedicated game server? It's not going to be 24/7, only when my friends and I will be playing, and won't host more than 12 people. Could I run Minecraft, TF2, L4D2, etc, servers off an old laptop? The specs are a dual core E-450 APU at 1.65 GHz, an ATI Radeon 6320, and 4Gbs RAM (which if necessary, I'll swap for 8Gb RAM). I'm not sure what my connection speeds are, as I currently only use wireless devices, and if I did a server only then it would be wireless, but according to Verizon my FIOS should be 50 megabits (not sure if wireless or wired). So, could I run Minecraft, TF2, L4D2, and other game servers for 12 people with those specs?
Focus on cpu speed, and how much memory the intended system has to run a dedicated game server. The bottle neck of course will come down to the fact of using a wireless connection if used.
To be honest you better off setting up a wired 12 computer lan, with the server connected. A 12 port ethernet hub should not cost too much these days, I think your looking at $90 or £60 for one today.
LAN is not possible as my friends and I dot bring our computers to each others houses for time and space reasons, but the server will be wired. How much would it tax a computer to run the game and a server for that game simultaneously? Because if my old laptop is too weak to be a dedicated server, I could run both the game and the server off my main rig, if it doesn't slow down performance too much. My main rigs specs are i7 4770k, 32 Gb RAM, XFX Radeon 7950, and will be wired.