I play ArmA 2 and ArmA 3 and my friend gets better performance then me when we have the same specs except he has a 7200rpm hard drive while I have some old one from a 2006 computer.
Specs:
i5 3570k
GTX 460 1GB
Asus H61
4GB RAM 1333 mhz
Specs:
i5 3570k
GTX 460 1GB
Asus H61
4GB RAM 1333 mhz