i have a hyper 212 evo on my i5 3570k no overclock. i can hear the fan and it kind of loud. what fan should i get to replace the hyper 212's fan with for silence. i was thinking the noctua nf-212. what do you think? i dont want to be able to hear it or as close as i can get. i will keep the hyper 212 evo heatsink, but switch fans on it .