I would add that each review could be "slightly" different - luck of the draw, better seated or better base for the test that day etc
and also if you want to try for the limits of overclocking with higher than normal overclocking volts - then choose a Good cooler...
have a look at this:
yeah, I am still running their 1st generation Hyper 212 and the newer Plus and EVO are just so much of an improvement on that. Feels nice that CoolerMaster did not stiff us over on the price with their nice product