Review on Apevia 120mm CF512S-BK Black Silent Case Fan (5-pack) with 4pin & 3pin by Justin Smith

All the fans were working properly upon arrival. However, within two months, three of the five fans began to rattle/vibrate intermittently. I tried a few different things to try to fix the problem, but ultimately decided that the problem was poor build quality and that some bearings must wear out incredibly quickly. One of the fans is completely unusable because of the background noise. The other two are still in use, but an unpleasant hum can be heard from the fans every 5-10 seconds. I would not recommend these.