Question re CPU & QPI Voltages

Higher voltages, frequencies, and heat all contribute to degredation (wear) on the CPU. However if your voltage is near stock, and the heat is reasonable, I doubt you will run in to problems, it'll likely outlast it's usefullness by a long margin.

In the unlikely event you get degredation problems, the solution is simply to lower the clock rate or increase the voltage slightly. The CPU wont just die, as this is a slow process.

In your situation i wouldn't have any worries or concerns myself.