This cooler should be sufficient too, although the better the cooling solution, the cooler the CPU will run. (and the cooler it runs, the longer it lives, however this isn't been entirely proved) Please higher your vCore, this is the voltage that goes to your CPU. IMHO 1.7 or 1.75 V wouldn't be too high for your cooler. Please try to boot at 3200+ speeds with 1.7 V. Also higher the RAM voltage to 2.8 V, this won't have ANY bad effects, as it's been built to work at this voltage. (most motherboards set 2.6 V as standard). Please note that a higher CPU voltages also comes with more heat that has to be dissipated. I'd strongly recommend you not to go higher than 1.75 V with your cooling.