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Coolmax / CX-400B / Silver / 400-Watt / ATX / 120mm Fan / SATA-Ready / Power Supply

Coolmax / CX-400B / Silver / 400-Watt / ATX / 120mm Fan / SATA-Ready / Power Supply
alaScore 74

166 reviews

Apr, 2018

  • Negative

alaTest has collected and analyzed 166 reviews of Coolmax / CX-400B / Silver / 400-Watt / ATX / 120mm Fan / SATA-Ready / Power Supply. The average rating for this product is 3.2/5, compared to an average rating of 4.2/5 for other Desktops for all reviews. Reviewers are impressed by the reliability. The price also gets good comments.

price, reliability

We analyzed user and expert ratings, product age and more factors. Compared to other Desktops the Coolmax / CX-400B / Silver / 400-Watt / ATX / 120mm Fan / SATA-Ready / Power Supply is awarded an overall alaScore™ of 74/100 = Good quality.

Review analysis

(Based on 166 reviews)

1 expert reviews

User Reviews  

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Consumer review ( review summary for Coolmax / CX-400B / Silver / 400-Watt / ATX / 120mm Fan / SATA-Ready / Power Supply


alaTest has collected and analyzed 3 user reviews of Coolmax / CX-400B / Silver / 400-Watt / ATX / 120mm Fan / SATA-Ready / Power Supply from The average user rating for this product is 2.7/5, compared to an average user rating of 4.0/5 for other Desktops on Reviewers are impressed by the reliability and price.

price, reliability

33% of the reviews on give this product a positive rating.

This summary is based on the products: Coolmax 400W ATX 12V Power Supply CX-400B (Black)Coolmax 400W ATX 12V Power Supply CX-400B (Black)

Apr, 2018

Expert review by : Steve (

Coolmax 400W ActivePFC EPS Power Supply


A couple weeks ago we had the opportunity to look at the Coolmax 480W fan less power supply. This supply was good for those who had a case fan near by to maintain air flow, but really heated up for those with no fans such as a liquid cooled system.

Quiet operation ; Stylish design ; 24pin ATX connector ; Powerful 400W ; Power correction features ; Very affordable

I would have liked to have seen a pattern of some kind with the sleeving

Coolmax definitely has a great power supply on their hands with the 400W ActivePFC EPS power supply. It has excellent performance and is very affordable, not to mention all it's cool features!

Consumer review (

very good, Cool And quiet


Used it about 3weeks now; no issues. I probably would not have bought if I had just read all the negative reviews here 1st, but it turned out to be a great power supply. Note: Description is WRONG, there isn't a 3speed fan switch, but all the other...

Mar, 2012

Consumer review (

Installation was easy and it's still purring


This was easy to install. Anyone can do it. If you can work a screwdriver and play connect the dots with the cable adapters, you are set. The price, compared to the manufacture of the computer itself, was a great deal cheaper. Installation time from...

Mar, 2012

Consumer review (

Great for the price


Very quiet, I've been using it for 1 year no problems so far. I like it.

Feb, 2012

Consumer review (

Good Value


Nice and quiet for the price...Good value for a home PC

Jan, 2012

Consumer review (

Well worth it for the money


I have used this in my acer desktop for about 2 years now. I have had 0 problems. I am not a heavy user in terms of hours of use but I do have lots and lots of items plugged in. I have all 6 usb items plugged in and 1 of those is a 4 port usb hub with...

Dec, 2011

Consumer review (

This one died long ago


It was a good PSU

Too bad it died and took my mobo and RAM with it

Oct, 2011

Consumer review (

6 years trouble free!


I've been using this unit since 12/04 with no problems whatsoever. Once, I bought a new graphics card and was having issues, so I assumed the p/s was not up to the task. Wrong. The problem was the motherboard - replaced that and this thing has been...

Nice looking, quiet, and steady as can be

Some of the connectors feel a little cheap

Jan, 2011

Consumer review (



Computer has been running flawlessly with win xp.

Almost 6 years old and still running strong. Below is what it is running ; 3.5 inch floppy drive ; HITACHI Deskstar 7K250 HDS722516VLSA80 (13G0254) 160GB 7200 RPM SATA 1.5Gb/s 3.5" Hard ; LITE-ON Combo Drive Beige IDE Model SOHC-5232K ; Item #:...


Dec, 2010

Consumer review (



The only reason I bought this PSU to begin with was because of the mail-in rebate. I would not buy it again.

Low price, looks nice, and it powers the computer

Not silent. VERY cheaply built - metal casing and connectors feel flimsy. Too many Molex connectors and not enough SATA connectors. One of the Molex connectors wouldn't fit on the optical drive, but I tried another one and it fit fine. One of the SATA...

Aug, 2010

Product Specifications

Coolmax's initial task of providing cooling solutions for electrical and industrial applications using AC and DC voltage fans is its solid foundation. The company's commitment to excellence in both products and service had earned for its the reputation as a leading thermal solutions provider in the industry. PRODUCT FEATURES: Long life 120mm silent cooling fan; High performance components are designed for extra long life and provide maximum system performance; Heavy duty transformers designed to support high performance system several drives; Cable-tube on main power cables for better cable routing and neatness & Colored fan (optional); Built in EMI filter, low ripple noise; Over voltage, Over power and Short circuit protection; Active or Passive PFC function (optional).


Product Type:Power supply
Subcategory (AG):Power supplies


Manufacturer:Coolmax Technology
Packaged Quantity:1
Product Line:Coolmax 120mm Silent Cooling Fan Switching Power Supply

Power Device

Form Factor (AG):Internal
Power Provided:400Watt
Power Supply Compatibility:PC/Server