Summary: These fans do not last very long at all for some reason. I bought 3 of them to last me through the year. I'm thinking it's a design flaw. You will start to hear a chattering sound coming from them after only a few months of use...... But with my case this is the only fan I can use in it.
Summary: I was really kinda love this item quite nice cooling till last week i start hear some noisy sound so i decide to clean it , when i remove screw noticed the fan is broken. so I bought another one past few days and it had noisy sound its really pissing me off so i don't recommend anyone to buy this also my case is Obsidian 650D and this fan hard to fit . note first one bought on November 8, 2011.