12V PC Fan Speed Controller, Fan Power Supply 100-240V AC to 3-12V DC 36W Adjustable, with Fan Splitter Cable 4X 3pin or 4pin Connector AC DC Adapter

Using it to run 16x 120mm on a server and it works flawlessly. I have various ones around the house and they all work great 👍🏼

Works nice as advertised.

Not enough power for 4 140mm Artic p13 fans it’s more like 6 watt

I currently use this as a controller that's connected to my Yamaha AVR to power three 140 mm fans that push air into the top to cool the unit. This pwm controller works great to control the speed of these fans, I run it at 25-30% and it turns on immediately as my AVR does as I have it powered from the jack in the back of the AVR. easy to use, noise level depends on what fans you have. pros: good build quality, decent control (the dial isn't my favorite but it's pretty set and forget), reliable. cons: none really

Used this to replace a faulty fan controller I had. Im powering some heavy duty 6500RPM Bitcoin miner fans which have a huge power draw. The previous fan controller could only get the fans up to about 50% before it got overloaded and shut off. This controller lets me get to about 75-80% which allows me to overclock my miner.

This worked perfectly. I had some fans that I used in a greenhouse but I didn’t have anything to connect it to. This made it happen.

It works, easy to use, connected 4 fans, raised the voltage to 12v and let it for more than 8 hours, the power supply does not get warm, I like that it has a 2.5 mm power jack connector.

This is a great controller to control the speed for various fans. I use it as part of my mini BTC mining farm setup and it works great. If you need to controi the fan speed of various PC case fans this is a winner.