One thing I have never done with all of my many computer builds over the years, is to "over-clock" any of its components.
If I am not satisfied with the performance of a particular component, I replace it with something more suitable, and leave it as standard, to ensure reliability and longevity.
Tinkering is for brave, dedicated; "Tinkerers"!...
Think of Aeroplane performance v reliability:
"vne" = Velocity Never Exceed!
Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.