The cheapest graphics card you can play it on is an NVIDIA GeForce GTX 970. Chamber 19 system requirements state that you will need at least 4 GB of RAM. You will need at least 3 GB of free disk space to install Chamber 19. An AMD FX-8350 Eight-Core CPU is required at a minimum to run Chamber 19.
Chamber 19 will run on PC system with Windows 7 and upwards.