An Intel Core i5-4590 CPU is required at a minimum to run Modbox. Modbox system requirements state that you will need at least 8 GB of RAM. Provided that you have at least an NVIDIA GeForce GTX 970 graphics card you can play the game. You will need at least 500 MB of free disk space to install Modbox.
Modbox will run on PC system with Windows 7 and upwards.