CX 400W ATX Power Supply (CMPSU-400CXUK)

  • The affordable Corsair Power CX400W is not your basic power supply. It boasts 120mm thermal fans and braided cables and gives a mass of power connectors for the most demanding of systems.
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Stock Code: CA-017-CS

EAN: 00000000


Manufacturer: Corsair

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Product information:

CX 400W ATX Power Supply (CMPSU-400CXUK)

The affordable Corsair Power CX400W is not your basic power supply. It features a thermally-controlled 120mm fan for whisper quiet operation and active power factor correction circuitry for clean, reliable power output. The extra long, sleeved cables allow easy integration into a wide variety of cases, and the large number of connectors assures compatibility with nearly all components.

- Supports the latest ATX12V v2.2 standard and is backwards compatible with ATX12V 2.01 systems.
- Rated up to 400W of continuous power output at 40ºC
- Extra long fully sleeved cables to support full tower chassis and assist with flexible cable routing.
- Ultra-quiet 120mm double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying the RPM in response to temperature.
- High efficiency topology to ensure energy savings.
- 99% Active Power Factor Correction provides clean and reliable power to your system.
- Universal AC input 90~264V automatically scans and detects the correct voltage. No more hassle of flipping that red switch!
- Dedicated single +12V rail offers maximum compatibility with latest components
- Over Current/Voltage/Power Protection, Under Voltage Protection, and Short Circuit Protection provide maximum safety to your critical system components.
- Standard ATX PS/2 size: 5.9"(W) x 3.4"(H) X 5.5"(L); 150mm(W) x 86mm(H) x 140mm(L)
- MTBF: 100,000 Hours


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Customer review

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Average customer rating

(from 8 customer reviews)
All Time (8)


This is a great little power supply. It is extremely quiet (infact, I can't hear it), and looks and feels like a good bit of kit too. I have one powering a Core i5 760 , 4gb RAM, Nvidia 8800 system - so not a very high draw one, but you wouldn't know the PSU is there it's so quiet.
The only con I can see is that there are an awful lot of cables which could pose a problem in a small case. They're all braided cables though, so atleast they look OK.
For 30 quid you can't go wrong!

J.Loveless 2010-08-29

Good PSU

A brilliant PSU for the money. my only problem is that if (while they come in handy) you have a small case there are a lot of cables to stash away and can make a buildlook untidy but as a compramise, a good PSU.

Damon Williams 2010-07-27


Lovely little peice of kit. Great value too, and the cables are all braided and very easily managed.

Ryan-3 2010-05-05

Exactly what it says on the tin

This is a sound power supply that was provided in an overclockers system. I have used this product on other builds too. You will find that any system running upto a GTX250 nvidia card and a dual core setup will get all the power they need. It is 100% stable even with overclocking.
It has quite a lot of juice down the 12v rails despite only being 400w. Confirmed that it does exactly what it says on the tin! If you need a small power supply for nice small gaming or productive rig, you cant go far wrong with this

Peter 2010-04-14

to many cables

this is solid and runs dead silent but like other people have said its not for a small case because you will use all your space trying to hid the cables because there are way to many

Jason 2010-03-30

Very good

A very good, quiet power supply.
Runs silently, whilst I'm only using the 24 and 4 pin ATX, two Molex and two Sata.
My only problem is that there are simple too many cables that I have nowhere to store the ones I don't use!
For under 40 quid you can't really go wrong with this.

Lawrence 2010-02-14

Great PSU for great price

I bought this for my gaming pc and It performs really well, my components get all the power they need.

Reccomending it to everyone.

James Ociepa 2010-01-16

Excellent basic PSU

I love corsair PSU's they're the best, and I wouldn't buy anything else. So when my ageing Antec PSU in my HTPC died on me one afternoon, I nipped on here and to my delight I found Corsair were now making a basic PSU. Its got all the quality I'd expect from Corsair, excellent amount of connectors, good length cables and they've all been braided too which I love. The fan is totally silent as you'd expect from corsair but not other basic PSU's.

The connectors are:
- 1x24 pin ATX
- 1x8 pin (split into 2x4 pin) ATX 12V
- 1x6 PCI-E
- 6x SATA
- 6x Molex
- 2x Floppy

All in all an excellent buy

jack 2009-11-01

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