Review on 🌀 ARCTIC F8 Value Pack: 80mm Quiet Case Fans (5 Pack) - High Performance Cooling Solution for PC - Push or Pull Configuration - 2000 RPM Speed - Black/White by Will Bremer

I have these Bought for use in the k77 ITX case. There are two 80mm fan mounts on the case and these little beasts do a great job. Two more are housed in the Super Microserver case and work there as expected. Not as good as a standard moving air server fan, but also a bit noisy. I would buy them again if I needed more 80mm fans, no question. Vibrations, apparently due to bearing loosening. There is side play on the fan blades. It's enough to be audible and resonate with the panels on my K77, so sadly they were removed from there. They will work on the server for as long as possible because it doesn't matter there, but I'd be lying if I said I wasn't disappointed. They worked so well that I'm just a fan of noises and rattles and because of that just don't work anymore. I'm really wondering about the CO option, but I'll let my previous "buy again, no questions asked" as I have some reservations for noise/vibration critical applications.