Depends on the server too, if you are using Xeon, it takes around 2 AMP. When you are rebooting server, it may take more. You need to have extra AMP, otherwise you may bring whole racks down.
Yes, most of the servers will be 1U servers and planning to put 2 Xeon server for gaming. How much amp xeon servers take?. Do we need power for any other equipment other than servers.
You should be fine with a half rack ad you'll need at least 20A of power, to leave some overhead, etc. Generally I would say you'd need to provide a switch, the data center should do the routing.