Hi,
Your graphics card is part of the problem, generating a lot of heat right bellow your CPU cooler, heat soaking it beyond its capabilities.
I would cap your fps to match monitor frequency, if its the case. The GPU will work less.
But all on all, I would use a 280 AIO or better on that CPU. Its not about air coolers being bad but the fact that AIOs take the CPU heat to the radiator.
Whats the case you have? And ambient temps?
Good luck
The Englishman