I've changed the cooler for my CPU before and overclocked it to 4.2ghz.Or the OP could just get a £20 cooler and overclock their current chip?? Or even find the AM3+ copper cooler for £10 and use that??
The stock cooler for the A8 6600K is the AMD aluminium cooler of fail and it would not surprise me if the CPU is even downclocking under heavy load too.
Plus like I said,what games??
FO4 is a modern game which has mods which make the game far more playable with little or no visual loss.
Or it could be PS2 which can tank on any modern system during heavy battles.
Also the games I want to game are new games with medium to high settings.