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Item#: N82E16817182072

Rosewill RX850-S-B - Xtreme Series 850-Watt Active PFC Power Supply - Continuous @ 104 Deg. F (40C), 80 PLUS Bronze, ATX 12V v2.2 & EPS 12V v2.91, SLI & CrossFire-Ready, Compatible with Core i7, i5

  • ATX 12V v2.2 & EPS 12V v2.91
  • 100 ~ 240VAC
  • 80 Plus Bronze Certified
  • Efficiency Up to 87%
  • 135mm Ball-Bearing Blue LED Fan
  • Email this page
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In a computing world of new video and audio cards, add-ons, higher-powered chips and more, the search for power goes ever on. Rosewill's RX850-S-B satisfies your power-hungry virtual instincts, and keeps you running at your best. Clad in a sleek black shell, lit within with a cool blue light, the impression is one of cool, secret power, ready to do your bidding!

Four 12 volt rails deliver power to a myriad of connectors ready to attach to any and every accessory you’ve stuffed into your case! This compact powerhouse will run everything even up to 2 SLI-equipped GeForce 8800GTX cards! Active Power Factor Correction provides clean and reliable power to all those pieces, and temperature, current and voltage protection circuits make sure everything stays healthy.

Run with the big boys with Rosewill's RX850-S-B PSU, and know you've got ergs to spare!

  • newegg ATX12V v2.2 and EPS12V Compatible Compatible with the ATX12V v2.2 and EPS12V standards, the Rosewill RX850-S-B provides maximum power stability to drive the latest Intel and AMD processors as well as other components for desktop and entry-level sever computer systems.
  • newegg 850W Maximum Power A maximum power of 850W delivers safe, reliable output for ultra high-end computer systems.
  • newegg 80 PLUS Bronze Certified The 80 PLUS BRONZE certified power supply provides ultra-high power efficiency of at least 82% at any load between 20% and 100%, saving you money on your electricity bill and reducing heat in your computer's system, prolonging its life.
  • newegg Quiet Operation The silent 135mm 2-ball-bearing blue LED fan delivers high efficient cooling and ensures quiet operation through fan speed adjustments in response to loading conditions.
  • newegg Excellent Mesh Cable Sleeving The Rosewill RX850-S-B power supply’s cables are wrapped in black mesh sleeving so your chassis stays neat for optimized air flow and enhanced cooling.

Learn more about the Rosewill RX850-S-B

Quick Info

Warranty

  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years


Customer Reviews of the Rosewill RX850-S-B

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  • Dean g.
  • 4/22/2015 9:53:42 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsGreat power, cool running,great price

Pros: Cool running, great power for price, I purchased 5 for projects I am doing.

Cons: none.
I see people complain that they have all the cables attached.....you know that already.
Having said that if you are looking to do a pretty see through case to show off your build this type of power supply will leave cables hanging all over.

Other Thoughts: I have used Rosewill power supplies a lot and just do not have problems with them and if you have a constant power demand then not having removable cables is a plus because each connection is resistance and with each connection comes more work and with each connection you have a chance of failure or connection needing reset due to ionization and having removed that element your build is stronger.

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  • isaac w.
  • 4/10/2015 6:21:12 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGreat!

Pros: Stable power supply. certified even if it's only bronze. have two cross fire HD 6850s overclocked, X4 860k overclocked to 4.2.
nice sleeved cords, blue led light which doesn't matter unless your case is on a shelf for some under glow. most cases mount the psu to have it's own airflow ( this is good)

Cons: only thing i can say is heat shrink on the 24 pin-power connecter doesn't cover enough, but most people won't care about that

Other Thoughts: saw someone review this and mention flipping the psu upside down to get the blue led to show in their case this would be bad for two reasons; you've now increased the heat in your pc greatly, and you've dramatically shorted the life of the psu by allowing dust to get sucked in.

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  • Robert H.
  • 4/3/2015 11:17:10 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsdesign something for me why dont you

Pros: Works fine fast delivery.

Cons: AVOID THIS POWER SUPPLY IF YOUR CASE IS FLIPPED OR REVERSED...

i flip my pc case upside down so gpu fan faces up. (looks hella better)

the connector are intended for the top down style setup. had to twist cables to get all sata connectors facing right way. besides that it worked out fine. so no 5 eggs..

Other Thoughts: I really hate the design of most case's i really like the gpu to face up... nothing worse than a nice en'tight card facing down so cant see all the splendor

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  • Nathen L.
  • 3/21/2015 8:07:11 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsNot very good at handling powerful GPUs

Pros: It can handle crossfired 7870s, overclocked FX 8350, SSDs, and a bunch of 120mm fans.

Cons: When I replaced my 7870s with a single GTX 980, does a hard shutdown of my PC when I run graphically intensive games.(I have to switch the psu on and off to be able to turn back on my pc) Because it thinks there is a power surge. Already tried reinstalling/cleaning drivers. Brought my FX 8350 back to default clocks, tested all the rams, and tried replugging in all the wires. NopeNopeNope. Wouldn't buy this again.

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 troubleshoot and/or warranty options.

Phone: 1- 800-575-9885
Monday - Friday 8AM - 5PM PST

Email: rma@rosewill.com
Email2: techsupport@rosewill.com


We look forward to hearing from you.

Thanks,
Rosewill Customer Care

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  • Anonymous
  • 3/19/2015 9:01:41 PM
  • Tech Level: Average
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsWorked great for a year

Pros: Worked wonderfully for the past year that I've had it.

Cons: Unfortunately, It's already starting to fail just a little over a year later.

Other Thoughts: This PCU worked great in the time that I've had it and under all the heavy use that it's been put through. But here it is about 14 months after the initial purchase and it's already showing signs of failing.

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  • DANIEL L.
  • 3/3/2015 6:04:55 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsIt Supplies Power

Pros: Once my replacement arrived and I got it installed, it worked perfectly. Haven't had any problems with it. I supplies power more than adequately for my needs, what more do you want? The fan in it works well and the light looks cool.

Cons: Dead on arrival. Caused me some grief getting my rig put together.

Other Thoughts: Newegg customer service was very quick about getting me a replacement, and once I had it my problems were over. Would buy again.

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  • Charles R.
  • 2/12/2015 4:41:34 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsThank you, I'll have another.

Pros: Been running for 5 years strong. Cable mesh is nice and pretty.

Cons: Only con is that it's not a modular, you can't take out the cables. But if you take your time they are long enough to tuck and hide.

Other Thoughts: Led light not as bright as it was 5 years ago. The first RX850 I got (DOA) blew (and took my motherboard with it), I RMA'ed it and got another RX850. It has been working flawlessly ever since. AMD 3.2 dual core with 4 gigs RAM and 1G video card.

I'm using the same RX850 in a quad core build to save money, hopefully after 5 years it can handle a few more good years.

On a side note it would be nice to have a free replacement RX850 to account for the price of the new motherboard the first RX blew 5 years ago. (Plus the shipping for the RMA and the price I paid to have the rest of my parts tested.)



My purchase history brings up so many memories...

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  • JAMES F.
  • 1/21/2015 5:05:01 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsGood while it was working

Pros: Ample power, plenty of connections, nice blue LED

Cons: first one failed after 11 months, RMA no hassle, second failed after 4 months, RMAing again,

Other Thoughts: loved the power supply while it worked.....

Did you find this review helpful? Yes No

  • Shane W.
  • 1/21/2015 12:20:46 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsPower Surges?

Pros: Good wattage for the price?

Cons: When faced with a powerful graphics card, this PSU routinely deems graphics draw as a power surge and forces the system to shut down to "prevent damage".

Other Thoughts: I've disabled the surge protection in the BIOS so I'm 100% sure this PSU is the source of the issue. I would strongly recommend NOT buying this PSU if you are using a GTX970 or higher. The PSU may meet the minimum wattage, but it falls FAR short of supporting the build.

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 troubleshoot and/or warranty options.

Phone: 1- 800-575-9885
Email: rma@rosewill.com
Email2: techsupport@rosewill.com

We look forward to hearing from you.

Thanks,
Rosewill Customer Care

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

  • William C.
  • 1/14/2015 5:54:53 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsNo good Power Supply

Pros: None. First unit failed a month after I had it.

Cons: This unit is flawed. Purchased the first one, did not power on at all. Returned. Received this one. Wanted to upgrade my 600W power supply to this 850 Watt. Powered on computer it ran for 2hrs before failing. This thing SUCKS!

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 troubleshoot and/or warranty options.

Phone: 1- 800-575-9885
Email: rma@rosewill.com
Email2: techsupport@rosewill.com

We look forward to hearing from you.

Thanks,
Rosewill Customer Care

Did you find this review helpful? Yes No

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Item#: N82E16817182072
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