The cheapest graphics card you can play it on is an NVIDIA GeForce GTX 970. In terms of game file size, you will need at least 2 GB of free disk space available. ChainMan system requirements state that you will need at least 8 GB of RAM. An Intel Core i5-4460 CPU is required at a minimum to run ChainMan.
ChainMan will run on PC system with Win.10 and upwards.