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  • Cooler Master Elite Power - 400W Power Supply (RS400-PSARI3-US)
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Cooler Master Elite Power - 400W Power Supply (RS400-PSARI3-US)

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List Price: $34.99
Price: $29.99 + $8.61 shipping
You Save: $5.00 (14%)
In Stock.
Ships from and sold by DIRECTRON.
400 Watts
  • Maximum Power: 400 W
  • Type: Intel Form Factor ATX 12V V2.31
  • PFC (Power Factor Correction): None PFC
  • Fans: 120mm fan
  • Connector: 1x 20+4pin Main Connector
30 new from $29.99 4 used from $25.00 1 refurbished from $24.99

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Frequently Bought Together

Cooler Master Elite Power - 400W Power Supply (RS400-PSARI3-US) + Asus 24x DVD-RW Serial-ATA Internal OEM Optical Drive DRW-24B1ST (Black) + WD Blue 1 TB Desktop Hard Drive: 3.5 Inch, 7200 RPM, SATA 6 Gb/s, 64 MB Cache - WD10EZEX
Price for all three: $108.98

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Size: 400 Watts
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Technical Details

Size: 400 Watts
  • Brand Name: Cooler Master
  • Model: RS400-PSARI3-US

Product Details

Size: 400 Watts
  • Product Dimensions: 5.9 x 5.5 x 3.4 inches ; 2.2 pounds
  • Shipping Weight: 3.4 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B002G1YPHA
  • Item model number: RS400-PSARI3-US
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (287 customer reviews)
  • Date first available at Amazon.com: May 12, 2009

Product Description

Size: 400 Watts

From the Manufacturer

From the Manufacturer
Elite power supplies deliver value while providing a durable power source for everyday computing. Using high performance components, Elite power supplies are compliant with most international standards including ATX 12V V2.3. Powerful dual +12V rails provide ample power for additional hard drives, and components.


  • Compliance with the newest Intel standard ATX 12V V2.3.
  • More than 70% efficiency at typical load operation.
  • High performance components design for better reliability.
  • Green power design to meet Energy Star and Blue Angel requirements.
  • Multiple protection design(OVP/OCP/OPP/SCP).
  • Support dual +12V1 and +12V2 outputs for higher power usage.
  • One 4+4 pin +12V CPU connector for high-end CPU.
  • EMI & Noise filter built in design.


Intelligent 120mm fan speed controller

Honey comb mesh increases airflow for better heat dissipation


Model RS400-PSARI3-US
Type Intel Form Factor ATX 12V V2.31
Dimension 150 x 86 x 140 mm
Input Frequency Range 47 ~ 63 Hz
PFC None PFC
Power Good Signal 100 ~ 500 ms
Hold Up Time > 17 ms
Efficiency >70% Typically
MTBF >100,000 hrs
Protection OVP / OCP / OPP / SCP
Output Capacity 400 Watts
Operation Temperature 0~40 °C (Nominal Input Voltage)
Safety CE / GOST / C-tick / UL
Fan 120mm fan
Connector M/B 20+4 Pin x 1
CPU 4+4 Pin x 1
4 Pin Peripheral x 3
SATA x 4
4 Pin Floppy x 1
6 Pin PCI-e Connector x 1
UPC Code 884102004667

Product Description

Cooler Master RS400-PSARI3-US Elite Power 400W ATX 12V Power Supply

Customer Questions & Answers

Customer Reviews

It was easy to install and works great.
Max
Fixed the problem and I have faith that this will last for quite a long time.
mkultra
It's very QUIET power supply and good pricing.
Y. Jeong

Most Helpful Customer Reviews

51 of 55 people found the following review helpful By electroman on December 16, 2010
Size Name: 460 Watts Verified Purchase
Update June 11 2012.....

Runs quiet and delivers stable reliable power for the average system what else can I say. For the money it's a great value and it warrants consideration by anyone building a typical system, even one with a mid range graphics card like my HD 5770 so long as you do not intend to overclock ANYTHING !

It should be obvious that if you wish to safely overclock or push you're system then you NEED an enthusiast grade power supply and you WILL pay for it $$$$

Simply put when used proeprly, this power supply is a 5 Star unit and a top value under 40 dollars!
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16 of 16 people found the following review helpful By King P on March 2, 2011
Size Name: 460 Watts Verified Purchase
I don't have high processing demands, but I did buy this power supply for a budget gaming rig I was building, and it works great. There are plenty of power connection options here, so no one will be left out. Plenty of Molex, SATA, +12 for everyone.

This unit powers a quad core phenom unit with 500GB HDD and 2GB of RAM. My NVIDIA GT430 1GB DDR3 video card also has plenty of juice as well.

If you are looking for a good budget power supply, this is the one for you!

Cooler Master also sells a case with an included 420watt power supply on Amazon as well. You can save 10-20 bucks if you go that route, but you lose 40 watts of POWER!
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37 of 47 people found the following review helpful By Jerad Avigliano on April 23, 2011
Size Name: 460 Watts Verified Purchase
Yeah I bought this because it was relatively cheap and appeared to have good reviews. Turns out that it has an annoying adjustable fan! Its not that it occasionally gets louder, it adjusts speed from low to high every 2 minutes, literally! It kicks into high speed for about 20 seconds and then its quiet for about 2-3 minutes, then it goes to high speed and so on. This will not stop.
My computer is at idle when this is happening. It doesnt have any GPU cards or anything stressing it at all. This PSU is too annoying to keep. I will be getting a different PSU.
This would be fine for a computer that is hidden in a closet or something like that. If you are looking for a quiet computer, this is NOT the PSU for you. This PSU is the loudest thing in my case!

Thanks for the comments :)
Just to balance it out a bit, this PSU has functioned well for my needs and has been reliable. From a reliability and build standpoint, it has done well for my needs. However, noise is a huge factor in may peoples builds and I think the company pulled a fast one on the customer with this one and could have designed it to work better with heat dissipation and fan settings. Really, the jump in fan noise is ridiculous considering that it could have been designed to run a bit louder but constant.

I guess that's what you do when you want to claim certain low noise level specs and you want to fool the customer into thinking those are constant low noise levels huh?
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10 of 11 people found the following review helpful By rainsquirrel on August 8, 2011
Size Name: 460 Watts Verified Purchase
My wife's Dell Inspiron quit working; just refused to power up. I found this power supply on Amazon based on the reviews and the Cooler Master brand. I had it quick shipped and it was delivered by noon the next day. The hardest part of the job was getting the old power supply out. I had to pull the fan and heat sink to give me room. There were only four connecions; two drives, the motherboard fan and the main bus. Pay close attention to the drive connections. This power supply is 460 watts compared to the 300 watt original, but the size and mount were the same. There were a numer of extra connectors not needed by the Dell Inspiron. Just tuck them out of the way. The whole process took less than an hour and the computer powered up immediately. My wife was happy to have her computer back in under 24 hours, and we saved at least $100 in repair cost. I'm very happy with the product and with Amazon.
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11 of 13 people found the following review helpful By AnnieWJ on August 1, 2012
Size Name: 460 Watts Verified Purchase
Have there been some new changes to Cooler Master Elite 460W ATX +12V V2.31 SATA, PCI-E Power Supply RS460-PSARI3-US?

The unit I just received has several variations from the product pictured and they appear to be improvements!

(I just added five captioned pictures with notes of the variations in the picture gallery).

1. The wires on my new power supply have a protective plastic grommet where they pass thru the metal case (instead of one mere zip tie through a little hole in the case to hold it and leaving the wires rubbing the bare metal edge of the case).

2. The socket for the AC cord has ears that allow for screws to fasten it to the metal case (vs. the pushed in socket with no screws)

3. The 115/220V switch is different and appears more substantial than in the pictures, different screws with slotted holes for them in the case, and has no metal case tabs impinging at the center of the switch.

4. The components on the inside (as can be seen thru the back grill with lots of light) are very different, looks like more of them, and laid out totally different than the components seen on the on-line pictures of the product.

Several other sites (not Amazon) showed the lack of the following changes:

5. There are 2 cables with four pin female plugs provided for the 12V CPU connection(s) to the mother board instead of just one.

6. The SATA plugs on other on-line sites had only 4 wires (leaving out the orange 3.3V wire on each plug) - This unit has all 5 wires including the orange 3.3 volt connections!

There may be other differences too, but I can't open the case without voiding the warranty.
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