It depends on the game itself. I play Alot of Starwars : The Old Republic, it's 7 years old. As is the i7-3770K and gtx970 I play on, the i7 at 4.6GHz, the 970 sitting at 124% OC. Single player, no worries at 1080p, frame capped in game to 90fps. 8man teams, no difference. 16man teams, boss fights get laggy unless I drop everything below medium settings, 24man World Boss fights, I use a melee toon, jump head-on, and don't worry about heals because I'm lagging so badly due to multi-player AI and all the casting and affects from them that I average 5-10fps.
On a 7 year old game. On a 8 thread cpu. And that cpu is marginally worse (@ 5% IPC) than the i5-4690k you posted that link on 5 minutes ago in another thread. With double the thread count.