Arbiter system requirements state that you will need at least 8 MB of RAM. You will need at least 250 MB of free disk space to install Arbiter. An Intel Core i5-650 CPU is required at a minimum to run Arbiter. The cheapest graphics card you can play it on is an NVIDIA GeForce GTX 960.
Arbiter will run on PC system with Windows 7/8.1/10 (64bit) and upwards.