400 Watt ATX12V 2.01 Dell Replacement Computer PC Power Supply

Replace or upgrade to a 400W power supply for certain Dell computer systems

Product ID: ATXPW400DELL

  • ATX12V version 2.01 compliant
  • EMI/RFI power filtration system provides low noise/ripple for super clean and stable power to all system components
  • 80mm fan provides efficient cooling for the system and the power supply
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  • High quality connectors provide minimal resistance and enhanced electric conductivity
  • Our power supplies are compatible with many of latest Intel P4 and AMD processors
  • PCI Express Connector for next generation video cards
  • 20/24 split motherboard connector
  • SATA connectors for SATA Hard Drive support
$0.00 CDN
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Where To Buy


This 400 Watt ATX12V 2.01 Dell PC Power Supply is a reliable upgrade or replacement for many compatible Dell computers (see compatible models below). It offers dual 12V power rails to deliver stable power to demanding components, as well as both 20 and 24-pin ATX motherboard power connectors and a generous number of component connectors to ensure broad system compatibility.

Constructed of high quality components and designed to provide a long-lasting, durable power source for hard-working PCs, the 400 Watt ATX12V 2.01 Dell PC Power Supply is backed by's 2 year warranty and free lifetime technical support.

The 400 Watt ATX12V 2.01 Dell PC Power Supply is compatible with standard ATX style versions of following:
Dimension Series Models: 1100 / 2200 / 2300 / 2350 / 2400 / 4300 / 4400 / 4500 / 4550 / 4600 / 8200 / 8250 / 8300 / 8400 / B100
Optiplex Series Models: 170L / GX60 / GX150 / GX240 / GX260 / GX270
Power Edge Series Models: 400SC / 600SC
Precision Workstation Series Model: Model 340 / 350
Smart Step Series Models: 100D / 150D

The Advantage

  • Dual 12V rail DC output provides support for Dell systems with updated motherboards and systems featuring more demanding components.
  • Inclusion of PCI Express Connector for support of next generation video cards not found in most other Dell replacement power supplies
  • Four SATA connectors for support of more SATA hard drives


Replacement 400W power supply, compatible with many standard Dell ATX PC's (see model list on Overview page)

Upgrade current Dell power supply for more power and support of upgraded 24-pin motherboards, SATA hard drives and PCI-E graphic card

Technical Specifications

Warranty Information
Warranty 2 Years
Fan Bearing Type Sleeve Bearing
Fans 1 - 80 mm
Air Flow Rate 32.3 CFM
MTBF 100,000 Hours
Output Power 400W
Power Factor Correction No
Output Connectors 1 - ATX 12V P4 Power (4 pin, v 2.x) Female
1 - ATX Split Power (20+4 pin, v 2.x) Male
1 - PCI Express Power (6 pin, v 1.x) Female
2 - SP4 (4 pin, Small Drive Power) Female
4 - LP4 (4 pin, Molex Large Drive Power) Female
4 - SATA Power (15 pin) Receptacle
Current +12.0V1 (A) 14A
Current +12.0V2 (A) 15A
Current +3.3V (A) 30A
Current +5.0V (A) 28A
Current +5.0Vsb (A) 2.5A
Current -12.0V (A) 1A
Input Current 8 ~ 4
Input Voltage 115 ~ 230
Input Voltage Frequency 50~60 Hz
Operating Temperature 0° ~ 50°
Storage Temperature -20° ~ 80°
Physical Characteristics
Enclosure Type Zinc-Plated Casing
Product Height 3.4 in [86 mm]
Product Length 5.5 in [140 mm]
Product Weight 4.8 lb [2.1 kg]
Product Width 5.9 in [150 mm]
Packaging Information
Shipping (Package) Weight 4.9 lb [2.2 kg]
What's in the Box
Included in Package 1 - 400W ATX Dell Power Supply
1 - Power Cord (NA)
1 - Instruction Manual



Product Support

Frequently Asked Questions

Before You Buy

There are a few factors to look at when deciding on an appropriate power supply for your computer. These will be outlined below.

Form factor offers ATX form factor power supplies.  This form factor is suitable for regular desktop computers.  These will not fit in smaller desktop computer cases that require mini or micro ATX form factors, such as slim line computers.  It is important to verify if your computer case and motherboard use the ATX form factor. Refer to the information provided by the manufacturer to confirm which standard you require

Power output

The power supply that you choose should be able to output enough power for all of your components, even under a very high load. The power output of power supplies can range from 200 to 1800 watts (for very high end products), but the most common power supply outputs are 300 to 500 watts. It is recommended to replace a power supply with one that can output at least the same amount of power.

Available connections

It is important to verify that the power supply has enough connections, and the appropriate type of connections for all of the components in your system. It is recommended you at least check for the most common types of connections, listed below:

  • ATX Split Power (20+4 pin) Male
  • ATX 12V P4 Power (4 pin) Male
  • LP4 (4 pin, Molex Large Drive Power)
  • SP4 (4 pin, Small Drive Power)
  • SATA Power (15 pin)

Your video card may also require one or two PCI Express Power 6 or 8 pin connectors.  Check your computer to see which connections, and how many of each you need. lists which connections a power supply provides on each product page under the Technical Specifications tab.

400 Watt ATX12V 2.01 Dell Replacement Computer PC Power Supply

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(1 star) Poor Choice Made In Buying This

I bought this @ 2 1/2 years ago. The first thing I noticed was how loud the fan was.Way too much background noise for my liking. Well,the Power Supply Unit is now dying and needs replacement.Not a very good investment for such a short life span. I see this Model has been discontinued.Not much wonder there for such a poor product. Not a happy consumer and customer for this unsatisfactory product.
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