Review on Noctua NF A6X25 PWM Premium Quiet by Melissa Johnson

These fans should be bought if you want to be sure you have the right cables and can handle the noise. They're very quiet to start with (which is good for a 60mm fan) and can then be made even quieter with the included adapter cable to slow them down even more. If your motherboard has decent fan controls you won't need these, but if you need to power them directly from a PSU they come in handy. They also come with extensions; The cables on the fans themselves are short, allowing you to keep the cables tangle-free and then extend them to reach them when needed. Only really good kits that will likely work in all but the weirdest cooling configurations.