My CPU overclock has helped get some extra life from my dated system.
This has been my philosophy since I have upgraded from ddr2 with the early intel quad cores on an x38 mobo. My old system could still max any game smoothly at 1080p with 8gm of ram and a 480gtx. I overclocked it as much as it could handle to minimize bottlenecking my pc. When Sandy Bridge E was released, I built a new pc and I'm planning on doing the same with it. I put my old x38 pc back to stock clock with a 9800 gtx and my parents still use it today, 7 years later. The moral of the story, don't overclock unless you actually need to.