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Item#: N82E16817182068

Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

  • ATX12V v2.31 / EPS12V v2.92
  • 100 ~ 240VAC
  • 80 PLUS Gold Certified
  • Efficiency up to 92%
  • 140mm Silent Fan
  • 7-Year Warranty
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BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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Learn more about the Rosewill CAPSTONE-550

Quick Info

Warranty

  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years


Customer Reviews of the Rosewill CAPSTONE-550

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  • Aaron L.
  • 5/4/2015 1:26:53 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsCool and Silent

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: Awesome power supply. I have run continuous loads of 500W (as measured from the wall). The power supply remains cool and silent under such loads. There was no need to mount the PSU upside down; it isn't adding much heat to my system.

Cons: Some people may have an issue with the lack of modularity. I picked the cables that were not needed, tie wrapped them in a neat bundle, and anchored the unused cables in front of the power supply. They can not be seen. I had no issues working with this PSU, but you may have an issue with a small case.

Other Thoughts: It really helps to assemble and test your components outside the system. Not only does it save time in the event of a bad component, but it forces you to think out your cable management before you build. This is probably why I was not unhappy about it not being modular.

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  • Scott R.
  • 4/17/2015 10:08:49 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsSilent Running

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: 80+ Gold certified
Silent
Lots of connectors
Wires to connectors are in braided sheaths
Appears to be very high quality

Cons: None

Other Thoughts: If do the math, you will find that an 80+ power supply (PS) will pay for itself.

For my analysis I assumed that for the life of the power supply I would operate for one full year, 8,760 hours, at 200 W ("Kill A Watt" Reading with 100 % CPU (i5-2300) and 100 % GPU (GTX 960) usage).

Now a cheap PS MIGHT BRAG about being 70 % efficient,
so power IN = 285.7 W,
thus consuming 2,503 kW•Hrs in 8,760 hours.

At 200 W, this PS will be 90.13 % efficient (interpolated using the parabola defined by tested performance values downloaded from the certifying body, PlugLoadSolutions),
so power IN = 221.9 W,
thus consuming 1,944 kW•Hrs in 8,760 hours.

Compared to the cheap power supply, this power supply will consume 559 kW•Hrs less in one year's worth of running.

I pay $0.142/k•hr, so this power supply will save me $79 in 8,760 hours of operation.

Here is the evaluation process as one big formula (efficiency is a number from 0 to 1):

$_Saved = Number_of_Hours_for_Analysis * ( Operating_Power_in_W / Old_PS_Efficiency - Operating_Power_in_W / New_PS_Efficiency ) * Cost_of_Energy_in_$_per_kWHr * 0.001

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  • Mike N.
  • 4/8/2015 7:29:10 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsOutstanding shipping

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: I don't often write reviews but this was a better than average experience. I ordered the power supply on a Monday and it arrived the next day. Came in a big box with plenty of packaging material. Hooked up the power supply that night and it works flawlessly. Very positive experience with Newegg. The power supply itself looks to be of high quality, nice textured paint finish. Seems to be very quiet.

Cons: Would prefer not to deal with filling out and and mailing rebate, but Newegg made it as painless as possible.

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  • Lucas C.
  • 1/27/2015 7:35:22 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsStill kicking after two and a half years!

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: This PSU has probably saved me quite a bit on the electricity bill (80 Plus Gold for the win...) since I've had it, as I usually have my PC on 24/7. Definitely quiet, easy to install, has plenty of connectors, and built with quality materials. Excellent PSU.

Cons: Not really a con, but this is non-modular. However, Rosewill has other options if you want to go that route, so there's that.

Other Thoughts: I originally bought this Power Supply for my first custom PC build back in the summer of 2012 (for $79.99, appears to be the same price today). Since then, I have upgraded a few things from the CPU to the GPU as well as adding a few hard drives. For those wondering what all you might be able to power with this thing, here's my current build:

Motherboard: Gigabyte GA-990FXA-UD3
CPU: AMD FX-8350
GPU: Gigabyte R9 270X 2GB
Memory: G.Skill Ripjaws: 16GB (4x4GB) @ 1600Mhz
Storage: 2xSSDs, 2xHDDs
Soundcard: Creative Sound Blaster X-Fi Titanium Professional Audio PCI Express
Case Fans: 2x200mm, 2x140mm
Other: Various peripherals, standard DVD burner.

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  • Keith G.
  • 1/11/2015 4:50:07 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsFirst build

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: Seems that Rosewill is very thorough in providing a sturdy, well made, completely compitent PSU.

Cons: Way too many options for me to sidt thru on my own. I skyped with a building expert and he walked me through it.

Other Thoughts: Will continue to review as i add more components.

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

  • Shuo L.
  • 1/1/2015 3:10:37 AM
  • Tech Level: Average
  • Ownership: less than 1 day
  • Verified Owner

4 out of 5 eggsGood product

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: It have a lot of cables. It more than enough for a gaming PC.

Cons: Too much cables takes up too much space.

Other Thoughts: Still recommended because it a Gold plus.

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  • Sydney P.
  • 8/3/2014 1:58:43 PM
  • Tech Level: Average
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsSolid 2+ years of 24/7 server work

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: Quiet, solid, 24/7 for last 2 years, no failures or issues so far.

Cons: It's not a 24+8+4 (with 2x 6's), so I can use it in my upgraded server.

Other Thoughts: I got this for a home server, looking for something solid, with the intent to use it later in a workstation with dedicated GPU's. I don't remember what reviews or tech info I read but I considered pros and cons carefully, and multi-use later down the road. It's more than I needed for my old dualie server and was at the time.

The only drawback now is that I can't plug it into my new server build now, as the mobo needs 24+8+4.

It's silent, and running 24/7 -I've only shut it off 3-4x in the last 2 years.
About 40% of the time the system is running at a workload of 60-80% (maybe 10% of the time it's @100% load).
I only need about 450w but this 550w PSU has been delivering fine with no issues so far. .

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  • Yuriy S.
  • 7/7/2014 8:00:08 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsSuper Quiet!

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: Got this because of the gold rating and low noise. This PSU is actually really quiet! I'm fully satisfied with it so far. It looks good... all black. Good long cables... reached everything with the PSU mounted on the bottom and cables hidden in the back of mobo.

Cons: None so far.

Other Thoughts: I don't have a graphics card yet to load up the PSU and see how loud it gets then.

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  • Jeffery C.
  • 6/23/2014 5:05:31 AM
  • Tech Level: Average
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsOwner for well over a year now

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: Great PSU. Had no problems at all and does what it's supposed to do. Powering an AMD 6300 cpu and an amd 6850 gpu.

Cons: none

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  • Ian H.
  • 6/16/2014 6:44:18 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAwesome power supply

This review is from: Rosewill CAPSTONE Series CAPSTONE-550 Continuous 550W & 50 degree C Power Supply

Pros: It's super quite, super reliable. I have nothing but good things to say about it.

Cons: I think it might make some noise. Not sure.

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Item#: N82E16817182068
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