The cheapest graphics card you can play it on is an NVIDIA GeForce 6200. An Intel Pentium 4 2.00GHz CPU is required at a minimum to run SCARF. You will need at least 100 MB of free disk space to install SCARF. SCARF system requirements state that you will need at least 4 GB of RAM.
SCARF will run on PC system with Windows 7 and upwards. Additionally it has a Linux version.
Note
These are preliminary system specs that can and will change!