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Item#: N82E16817182021

Rosewill RD400-2-DB - 400-Watt ATX V2.2 Power Supply

  • ATX V2.2
  • 115 ~ 230 VAC
  • Dual 80 mm Ball Bearing Fans

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

In today's power hungry world you need a PSU that can deliver, and the Rosewill RD400-2-DB does. With 400W of total output power there's plenty of juice for the most demanding situations. Dual 12V rails with 27 amps of power provide plenty of independent, reliable power.

As in all cases, being well connected is of major importance, and sprouting from the housing are a multitude of mesh wrapped cables to connect all your components. The mesh wrapping keeps things neat and helps promote better airflow and cooling. Universal motherboard connectivity is ensured with the 20+4 main connector and 4/8 pin EPS connector.

All these are enclosed in a flat black housing with multitudinous ventilation holes and dual 80mm cooling fans. The smart temperature sensor intelligently adjusts the fan speed according to the system temperature for minimized operation noise.

  • newegg ATX12V v2.2 Compatible Compatible with the ATX12V v2.2 standard, the osewill RD400-2-DB power supply provides maximum power stability to drive the processors as well as other system components.
  • newegg 400W Maximum Power A maximum power of 400W delivers safe, reliable output for average gaming computer systems. Two industry-leading independent +12v rails are provided for more stable and safer power output.
  • newegg Quiet Operation Dual 80mm fans with Smart Temperature Sensor delivers whisper-quiet cooling through fan speed adjustments in response to load conditions.
  • newegg Excellent Mesh Cable Sleeving The Rosewill RD400-2-DB power supply’s cables are wrapped in mesh sleeving so your chassis stays neat for optimized air flow and enhanced cooling.

Learn more about the Rosewill RD400-2-DB

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Customer Reviews of the Rosewill RD400-2-DB

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  • Ian W.
  • 4/12/2016 3:48:20 PM

1 out of 5 eggsDied in less than two years.

Pros: Worked ok for a little while.

Cons: The fan started making a whining sound about a year in. It was dead a few months later.

Did you find this review helpful? Yes No

  • Matthew T.
  • 7/2/2015 11:06:46 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWorks well

Pros: Cheap & works great

Cons: None if you know what you're buying.

Other Thoughts: I needed a cheap psu from a "known" brand for my little htpc. This thing has been kicking 24/7 for over 6 months.

Did you find this review helpful? Yes No

  • Steven R.
  • 6/23/2015 8:58:13 PM
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsworked great for 1.5 years...

Pros: It was cheap and above the wattage I needed. Worked great ran the build perfectly.

Cons: Lasted 1.5 years of light work, mostly word processing and excel with very minimal internet usage.

Other Thoughts: Better products are out there but you pay more for them. There are also much worse products out there that cost more. Its all really a craps shoot.

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  • John B.
  • 5/13/2015 8:38:07 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsGreat PSU for the price

Pros: Works great in my Mini ITX Build, barely any audible sound.

Cons: The wires can be kind of bulky but that's the nature of non-modular power supplies.

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  • Kyle G.
  • 1/13/2015 9:40:06 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsExactly what I wanted

Pros: -Had everything I needed.
-Was Exactly as described.
-Installation was quick and simple.

Cons: On my end:
-Power port ended up behind part of my back wall. My case was designed by and for HP and their specific set up so not Rosewills' fault.

Their end:
-The cables and their sheathing are very thick. Not sure if this is specific to this product or power supplies in general but they get in the way in my smallish case.

Other Thoughts: I ended up deciding on this specific power supply mostly because of the duel fans. My current case is kind of small and designed for one specific build so I don't have much room to work with. This meant that having an extra fan on the power supply in theory should help out the rest of the case.
All in all, the power supply seems great.

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

  • Kennet H.
  • 1/5/2015 9:44:32 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsSolid

Pros: Been using as replacement supplies for an Optiplex desktop to get enough power on the 3.3V line to support PCI cards. Did not want too much wattage as that can lead to too much heat which the Optiplex may not be able to handle.

This supply is a great low-cost supply to upgrade to middle level power capacity.

If you are looking for a supply for a gaming rig with a monster video card, then you will want a supply with plenty of amperage available on the 12V lines, and a total wattage >= 600W.

Cons: None really.

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

  • Janet B.
  • 9/12/2014 5:58:15 AM
  • Ownership: more than 1 year
  • Verified Owner

1 out of 5 eggsPSU Failed just after warranty expired

Pros: Cheap. It worked well while it lasted.

Cons: Three weeks after the warranty expired, it failed. It sounded like fireworks, and my machine was suddenly off. I removed the psu from the machine to find a green capacitor cap fall out of it.

Other Thoughts: I original thought it was still under warranty. Tech support was very courteous, but informed me it was just out of warranty.

Manufacturer Response:

Dear Valued Customer,
Thank you very much for purchasing this unit.
We strive to provide the most reliable and highest quality products to our customers.

We are sorry to hear that, please contact our support team to assist you with warranty options.

Phone: 1- 800-575-9885

We look forward to hearing from you.

Rosewill Customer Care

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

  • Patterson N.
  • 6/18/2014 9:04:19 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsGo To Hardware / It is Good

Pros: Have purchased and instal several of these and other Rosewill Power Supply products, never had an issue. Some have been in service more than a year. These are good quality units for the mioney.

Cons: None /

Other Thoughts: I use these as replacement units for client computers, and regular customer replacements. Fit all standard PC chassis

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

  • Tyler S.
  • 6/14/2014 10:48:32 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWorks Great

Pros: Great litle PSU at a great price.

Cons: Not made for a heavy load. Made for a basic computer running a small or no GPU and few or no PCI cards.

Other Thoughts: Used it on a build for a friend and he hasnt had a single issue running it on these parts:
G3220 Pentium CPU
Stock Cooler
M-ATX ASUS 1150 Mobo
4 Case Fans
8GB (2x4GB) Ram

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

  • Clarke's C.
  • 5/16/2014 1:16:57 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsIt worked fine for about 2 1/2 months.

Pros: -It wasn't incredibly loud
-Nice sleek black design
-Plenty of SATA cables

Cons: - 2 1/2 MONTHS!

2 1/2 MONTHS! 40$!

Other Thoughts: I used my HT/Gaming PC on occasion, as I would usually be at work/school. I frequently kept it off. One morning while getting ready for school, I needed to check on a website for some information. When I pressed the power button, nothing came on. I switched power cables and made sure everything was plugged it. It still didn't work so I waited to troubleshoot it in the afternoon. When I hooked up another PSU, it worked.

I expected a 40 dollar PSU to last longer than that, especially coming from Rosewill.

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Item#: N82E16817182021
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