Coolerguys 100-240v AC to 12 & 5v DC 4pin Molex 2A Power Adapter (2A, Without On/Off Switch)

I prefer to use this to start my watercooling system, its much better than using the paperclip method or motherboard clip option, IMO. Worked like a charm to leak test, and to run the system with no electronics on. just make sure your pump is the 4 pin molex, some newer D5 pumps use sata or other such options.

Works exactly as advertised. I'm using this as the power source for an external radiator build. Powers 4 200mm fans, a dc pump, and two temp/flow sensors utilizing an aqua computer quadro with no issues . The freedom this has provided to run all of my watercooling accessories externally is amazing

So, SO happy I found this; even happier that it works like an absolute DREAM! I have an old IDE Maxtor HDD from 2001 that I have been trying just about every method I could find to somehow access the data on it. After a bunch of failed attempts with different methods and devices, I finally figured out that the drive simply wasn’t getting enough power. This drive needs precisely the output that this brick/cord provides. I attached this to the drive and it immediately spun up with not one single issue. Another bonus: the cords are both nice and long. This cord thoroughly made my year!!

Pros:+ Convenience , reuse spare Computer Fans for out-of-pc applications+ Great Fan Tester to check noise levels at 12v and 5v (for 5v, use a 5v molex adapter or Red/Black lines). Also handy to check if the bearings are going bad or need to be lubricatedCons:- This power adapter doesn't maintain good voltage control over load.Under 12v @ 1A power load, this was reading about 10.9v for me on the +12v rail. That is well out of the +/- 5% comfort zone that I am comfortable with. I would recommend to NOT use this to power up Hard Drives or anything that has a higher power draw.... especially if you have important stuff on it!Conclusion: Only good for fans and testing. Do not expect to get full 12v out of it under load. For silent applications, this is mostly fine as most fans will be undervolted for lower speeds.... Just use a manual fan controller for full control

The item does not provide stable power. The other reviewers were correct. It ran fine for a few days and then recently it began having issues. I didn't bother running a multimeter on it. I'm just glad it didn't fry anything.

This product is a lifesaver honestly.I wanted to keep my reciever cool, and I have tons of used computer 120mm fans laying around, but with no way to give them power since they use molex connectors.Enter this product and bam, problem solved. You just plug it into your wall outlet and you're able to run any molex powered device off of it.Depending on your fans voltage rating, you can get quite a few fans running off this thing. I was personally was able to chain 4 with no issues, and now my reciever is nice and cool when it's running.This product is definately a nice quality, but I will admit the price seems a little steep to me. I feel like it could be a little cheaper. But I looked around the internet and this price was pretty consistent with competitor pricing that I could find, so I decided to order based on Coolerguys reputation being my deciding factor( I've dealt with them pretty often because I build computers and never had a problem with them). If I could have found a different molex power adapter for a significantly cheaper price, I probably would have went with that though.This product would also be good if you wanted to run some molex powered LED cathodes or lights to light up your computer desk a little. I'm thinking about ordering another one for that use.

Great product, only 2A molex supply I could find anywhere.

I wanted an external power supply with Molex connector to run an out of case diskette drive (if anybody remembers what those are). Out of the box, it appears to be excellent quality, good construction. Voltages test as specified. Powered up the drive.Important Note: There are four pins on Molex connectors for this type of power supply. The outside connectors are for the two different voltages, 5 and 12. The two inside connectors are ground. In SOME supplies only one of the inside connectors actually exists; the other is a non-functional dummy. That can be a problem. With this adapter BOTH inside connectors are grounds. The description does not specifically address that, but I verified.