MEIRIYFA 3 Pin 4 Pin Fan Adapter PWM PC Chassis Cooling Fan Hub 8 Way Splitter DC12V Speed Controller with 6 Pin Power Port,Chassis Fan Pressure Regulating Governor

Used for a Dell Optiplex SFF case swap so the motherboard could be used with a large GPU. MB only had one pwm fan header for the CPU fan. Was able to add 2 case fans that turn on and off with the computer and which speed is adjustable. Plugs right into the 12v 6pin plug from the aftermarket PSU. No need for SATA power. Solved many problems at once. We'll see how long it holds up.

I'm using this in a 4u atx pc build. If you want a high wattage static rpm fan controller, this will get the job done. It has plenty of wattage to power multiple high wattage fans. That being said, this is not a smart contoller, it does not output a PWM signal, its just a potentiometer with fan headers. Nothing more, nothing less.It works great for my use case, cause I just wanted a couple of fans to run at a static rpm. If you are looking for something that can match a motherboard fan speed, or constantly change rpms this is not the product you want. This is a dumb "controller" and it does exactly what it should. I've had mine installed for over a year and it has worked flawlessly.

You know what, this is finally the first one of these I've bought that actually uses a pwm signal to drive the fans. I have three others that say they are pwm fan controllers but they use the pwm as a buck driver and the output voltage to the fans is what gets changed. So if you want a knob that changes the pwm signal to the fan header while your fans get a constant 12V, this is the one.

Good little fan regulator. It works!

BUYER BEWARE: My device arrived DOA. I tested with multiple power supplies and the onboard LED does not illuminate and the connected fans do not have power.I didn't get the opportunity to test until now and I am bit more than a week out from the return window.

Having a manual know to adjust the fan speed on a hub is great.Upto 8 fans on the little hub.The pcie 6 pin is odd, but supplies plenty of power.Red light is bright, but let's you know it is receiving power.I use it to test fans, and compare their out put without having to go to the bios to change any settings. It works well as a stand alone connected to a PSU.

Easy to install and gives you the ability to power multiple fans, but the speed control knob does not work with Supermicro fans.

A lot of motherboard manufacturers force customers to install what is effectively adware to control fans. (e.g., We'll ask if you want to install Norton Antivirus "free trial" again, even though you declined the last 10 times.)These little wonders allow you to take back control of your fans without the bloat and annoyance.They're especially handy if you want to run a quiet build with fan speeds that consistently run without noise.