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Item#: N82E16817159023

COOLMAX CX-400B 400W ATX v2.01 Power Supply

  • ATX v2.01
  • 115 / 230 V 50/60 Hz
  • +3.3V@30A, +5V@28A, -5V@1A, +12V1@14A, +12V2@15A, -12V@1A, +5VSB@2.5A
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The Coolmax CX-400B Power Supply is compliant with the ATX12V version 2.0 standard, and offers dual 12V outputs for stable power delivery to all your components. The cable-tube on the main power cables offers better cable routing and neatness. Over Voltage Protection and Overload Protection keep your system intact from power mishaps.

 

  • newegg ATX12V Compliant Compliant with the ATX12V v2.01 standard, the Coolmax CX-400B Power Supply provides the maximum power stability to drive leading Intel and AMD processors, as well as other components.
  • newegg Silent 120mm fan The Coolmax CX-400B features a built-in 120mm silent fan for whisper-quiet cooling.
  • newegg Tied cables for a tidy look! The cable-tube on main power cables provides better cable management and a neat look.

Learn more about the CoolMax CX-400B

Model

Brand
COOLMAX
Model
CX-400B

Spec

Type
ATX v2.01
Maximum Power
400W
Fans
1
PFC
No
Main Connector
20+4Pin
+12V Rails
2
PCI-Express Connector
No
SATA Power Connector
2
SLI
No
Haswell Support
No
Modular
No
Power Good Signal
100-500ms
Efficiency
> = 65%
Over Voltage Protection
Yes
Overload Protection
Yes
Input Voltage
115 / 230 V
Input Frequency Range
50/60 Hz
Input Current
10/5.5A
Output
+3.3V@30A, +5V@28A, -5V@1A, +12V1@14A, +12V2@15A, -12V@1A, +5VSB@2.5A
Approvals
UL, CSA, TUV, CE
Dimensions
5.60" x 5.90" x 3.30"
Weight
3.96 lbs.

Features

Connectors
1 x Main connector (20+4Pin)
1 x 12V (P4)
6 x peripheral
2 x SATA
2 x Floppy

Dimensions & Weight

Dimensions
3.50" x 5.75" x 6"

Manufacturer Warranty

Parts
1 year limited
Labor
1 year limited

Quick Info

Warranty

  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year


Customer Reviews of the CoolMax CX-400B

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  • David C.
  • 3/17/2014 6:20:29 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsOverrated Junk (275W PSU)

Pros: Coolmax has been "updating" this model of PSU, but mostly downgrading it further. It does have some pros though...barely.

It uses a nice quality fan, and even though it's wired straight to the 12V all the time (No thermal fan control whatsoever) it stays quiet, and the bearing has plenty of grease so it shouldn't fail.

The older revision of this PSU used the infamous two transistor circuit for the +5VSB, which wasted a lot of electricity and killed lots of motherboards. They updated it with an 8 pin IC to generate the +5VSB which is a lot more efficient and isn't prone to frying your motherboard.

Cons: Everything else... The old revision (Circa 2009) could pump out about 350W, this one is capable of about 275W (With a very mixed rail load).

It claims two 12V rails capable of 348W. HA! It only has one rail, and it uses a 16A ultra fast rectifier. Since the fan runs fast keeping it cool, I bet it could do the full 16A, but that's only 192W...Almost 90% of your computer uses the 12V. That makes this basically a 200W PSU in a modern system. And if you load it up, that 12V rail is going to sag quite a bit...

Other Thoughts: Don't give these guys your money, they don't deserve it.

Did you find this review helpful? Yes No

  • Anonymous
  • 11/6/2013 8:21:23 AM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

2 out of 5 eggsLoud, no fan switch as advertised.

Pros: It worked for the 30 minutes that I used it...very loudly.

Cons: The box advertises a fan switch, and the unit pictured on the box shows on. This switch is missing from the actual unit, and the thing sounds like a jet engine with the PC mounted in the computer desk. It's literally intolerable. Fix the packaging and don't advertise a switch that isn't there.

Did you find this review helpful? Yes No

  • Reid B.
  • 9/24/2013 11:44:03 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsOne Rebate

Pros: Looks like it will be ok have yet to use.

Cons: Don't count on buying multiple PS with rebate it says one rebate, item household. Even though the limit to buy was 5

Did you find this review helpful? Yes No

  • Nathan L.
  • 7/12/2013 10:44:09 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsworks, lack of parts provided

Pros: It works thus far

Cons: This power supply came without a power plug, which to me seems extremely cheap of the manufacturer, luckily i had plenty of extras

Did you find this review helpful? Yes No

  • Pavel R.
  • 11/13/2012 10:07:35 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsNeeds lubrication

Pros: I bought two units and both have been working fine for years. The units are very quiet if they don't need lubrication. They worked after the hurricane Sandy, when some other PSUs refused to turn on, probably due to flaky mains power.

Cons: Both units became noisy after a few years of use. I had to open both of them and lubricate the fans with garage door lubricant. Both are quiet again. The device shows its age. Who needs so many molex and floppy connectors? And 2 SATA connectors are not enough for anything beyond the simplest setup (one hard drive and one optical drive).

Other Thoughts: I have other power supplies that have been working for years quietly, without requiring to be lubricated. I cannot recommend this unit to anyone.

Did you find this review helpful? Yes No

  • Zann A.
  • 10/8/2011 9:37:42 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

2 out of 5 eggsThis one died long ago

Pros: It was a good PSU

Cons: Too bad it died and took my mobo and RAM with it!

1 out of 4 people found this review helpful. Did you? Yes No

  • Zann A.
  • 10/8/2011 8:27:26 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

5 out of 5 eggsIt's still running!

Pros: It's still running!

Cons: None really

0 out of 2 people found this review helpful. Did you? Yes No

  • Arlene C.
  • 7/6/2011 11:15:36 AM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

3 out of 5 eggsNot Enough Power...

Pros: Sleek look.
Average Power Rating.
Extra SATA power connectors from Molex.

Cons: Its not really 400W...
ITS REALLY 375W...

Other Thoughts: I needed 400W, at least, to run a video card (when this is really 375W)... they lied... it won't last more than a month before it fries... DON'T BUY IF YOU NEED MORE POWER...

0 out of 2 people found this review helpful. Did you? Yes No

  • Matthew N.
  • 6/17/2011 10:22:42 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggs

Pros: Great Power Supply, Havent had any problems with them

Cons: None

Other Thoughts: Have bought several

Did you find this review helpful? Yes No

  • Serge G.
  • 6/13/2011 5:59:47 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

1 out of 5 eggsCOOLMAX CX-400B

Pros: Cheap.

Cons: Coolmax CX-400B power supply died after 13 months. And the warranty is only 1 year. Value Engineering in action?

Did you find this review helpful? Yes No

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Item#: N82E16817159023
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