System requirements are a joke and I'd take them with a grain of salt. Let's take Fallout 4 for example. They put minimum an i5 2500 or a Phenom 2 X4 945. Do you know how much more powerful an i5 2500 is compared to that X4? An i3 will run circles around it. Fallout 4 is a 1-2 core game like Skyrim, there's no reason to require a quadcore let alone an i7 for recommended. I believe they're doing it based on clock speed, which my article also addresses as a dumb way to analyze performance.