Are there cons at all? 
I never had problems with fans noise, I usually get used fast to any irritating sounds - be that either coolers or a neighbor with a masonry drill - and stop notice it, but when I bought my last computer with a full water cooling (including the PSU) I noticed a huge difference. It runs 24/7 and the first I do after I wake up or come home - check the power light on the case, because that is the only way to tell is it on. It's amazing  .
|