The i5 is more than fine for any game right now, and for some more years atleast. With i7, you do get a couple frames extra, it ofc is better than i5, but the difference is not that big as to overlook i5's value/money. In a nutshell, if you have an i5, don't upgrade to i7, the benefit is not worth the price premium. If you're planning to buy, i7 does have a sleek advantage, and streams content better than i5, so if the budget allows w/o compromising on other parts, feel free to get an i7.