https://www.systemrequirementslab.com/all-games-list/
Website that shows you the minimum requirements to run any game. Best thing to do is My Computer/This PC - > Properites.
It will show you your Cpu, Ram and card.
Also PC Part Picker, (
https://uk.pcpartpicker.com) a website where you can build your own PC, shows you, the price and compatibility, also you can follow guides on there as well.