CRJ Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable

This was exactly what i needed to repurpose an old tower desktop fan. The fan was still great, it just needed that bridge from 3-pin to USB. That being said, as everyone mentioned, this is just a two pin setup. But the fans ran as soon as I hooked them up and plugged them in to a USB outlet or a plugin adapter. This will run the fans at full speed and you will get a fair amount of breeze. Perfect for how i wanted to use this to cool additional electronics.

When it works it works great, it steps the voltage up to properly use a 12V .25A static pressure fan and I appreciate that. Unfortunately its making extremely bad contact and only works with someting putting pressure on the leads. Annoying.

Very nice product if you are trying to hook up a case fan through USB. Loved the braided cable on this one, and it works as intended! Not much else to say. 10/10

I bought this to use with a 12 volt dehumidifying telescope fan. It works as expected and the fan runs at full speed.

My son bought this to use with his custom 3d-printed laptop cooler/stand (designed/built/printed himself). He ran two 120mm fans off of it and it worked great. No issues with the USB port or the fans when using the cable.

I got this product to use an extra 140mm pc fan on top of my Xbox Series X. This adapter provides 12v and the fan runs at full speed which is ideal for me. The Xbox is much cooler to the touch and I feel better than the internal parts are cooler too. I used an extra USB wall adapter which provides 2 amps at 5/12v.

I greatly underestimated how fast or loud powering a 120mm case fan with this would be. The cable itself isn’t anything special and feels sturdy enough. Most importantly it does what it is supposed to do. So if you need high rpm, high noise, 24/7 fan operation you cant go wrong.

Nice build quality, looks good, does its job so far. I used it to power regular case fans in my network cabinet. Much quieter than the muffing fans now.

Ive pugged this into several different charging blocks. Works great, awesome for testing fan motors. I bought it to use in a soldering vent setup, keep using it to test computer fans.

Im using this to add a little more airflow for the PS4 Pro exhaust. With a 120mm fan, the noise is quieter and less distracting than the PS4 alone when the fans would spin up high.