We designed Hadron mining to have fairly light system loads per mining tab. That way, you can continue using your device while mining. And older, lower-end devices can be used (as can higher-end machines, of course). That means most modern devices can perform mining without a problem.
Small tweaks in your configuration (e.g. more RAM) may marginally increase your mining speed. But at this point, we don't recommend anyone buy hardware solely for the purposes of Hadron.
I understood you, I noticed that most of the participants have good characteristics of computers, so I thought that powerful PC will give more performance, but now I realize it doesn't matter.