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Item#: N82E16817207028

XFX P1-850B-BEFX 850W ATX12V 2.2 & ESP12V 2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply

  • ATX12V 2.2 & ESP12V 2.91
  • Full Modular
  • 80 PLUS GOLD Certified
  • 100 - 240 V 50/60 Hz
  • +3.3V@25A, +5V@25A, +12V@70A, -12V@0.8A, +5VSB@3A

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

XFX 850W Full Modular Power Supply

Designed for serious gamers and DIY professionals, the XFX P1-850B-BEFX PSU delivers clean and stable power required for demanding gaming rigs and workstations. A single, strong 12V rail flexibly routes maximum available power to all parts, enabling you to maximize power usage and make your set up easy. It's also been awarded the 80Plus Gold certification for its high power efficiency, and is designed for NVIDIA SLI and AMD Crossfire multi-GPU systems - making it a perfect solution for hardcore gamers. Modular design reduces cable clutter, and the large fan delivers silent cooling so your computer and PSU can operate at peak performance.

Features

XFX 850W Power Supply

SolidLink™ Power Supplies
Less Wires. Less Heat.

XFX 850W Power Supply

SolidLink Fully Modular PSUs don't have as many primary wires - instead we use pin lag that directly connects to the connector's daughter board.

XFX 850W Power Supply

Traditional fully modular PSUs tend to have a bundle of cables which are connected to the connector daughter board which generate heat causing Wattage loss.

SolidLink™ Technology Difference

  • Drastically reduces the lost Wattage
  • Draws less wall power which saves you money
  • Replaces traditional wired connections with direct pin-to-port connections
  • Reduces heat generated by wires
  • Reduces lost Wattage giving you clean, consistent high quality voltage

Hybrid Fan Control
Quieter & More Power Efficient

XFX 850W Power Supply

Hybrid mode when activated, allows your fan to stay off when your computer is idle but turns on automatically when the PSU needs it.

  • Operates Silently until it reaches 20% load or 25°C
  • Switches to Quiet Mode (only 16dBA)
  • Reaching 50% load which Cooling Mode to cool the PSU appropriately

80 Plus Gold Certification
Super High Efficiency

XFX 850W Power Supply

Efficient Power Use

  • 80 Plus Gold certified means that this XFX PSU has up to 90% power efficiency (only 10% of the power drawn from the outlet is lost).
  • Compare that to non-certified PSUs, which lose at least 20% of power drawn.
  • With XFX PSUs, you get every Watt you pay for.

The XFX Difference
Other Great Features


  • Full Modular Design
  • Up to Eight (8) PCI-E 6 + 2-Pin Connectors
  • True Wattage Guarantee
  • Tight DC Voltage regulation with minimal AC ripple
  • Extreme Heat Tested Capacitors

EasyRail™ Technology
One Rail, One Setup

XFX 850W Power Supply

Single Rail Design

  • Unique, continuous EasyRail™ technology enables you to maximize available power and make set-up easy.
  • Stack numerous power-hungry components without fear of crashing.
  • It's also a perfect solution for hardcore gamers.

General Specs


  • 850W Max. Power Output
  • 47Hz - 63Hz Frequency
  • Single Rail
  • Auto Switching 115V and 230V
  • Includes AC Power Cord

WHAT'S IN THE BOX

XFX Power Supply

Learn more about the XFX P1-850B-BEFX

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details

Customer Reviews of the XFX P1-850B-BEFX

Do you own this product? Write a Review

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  • Sharyn j.
  • 8/7/2015 1:49:54 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsStill going strong!

Pros: Fully Modular, Silent operation off load, reliable

Cons: None

Other Thoughts: I've enjoyed this unit for some time now. It's very efficient and I love the "hybrid" fan control. This unit has powered an AMD FX-9590 and R9 290x for some time now with out complaint. Another reliable XFX product and satisfied purchase.

Manufacturer Response:

Thank you for the great review, we appreciate your positive feedback.

If you have any questions, please let us know.

XFX Support
neweggsupport@xfxforce.com

Did you find this review helpful? Yes No

  • Brady R.
  • 2/16/2015 4:23:28 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGenerally a great PSU

Pros: What drew me to this PSU was its looks and its rating. The looks didn't matter too much while I knew my power goes out quite often so the gold rating was looking pretty good! It just went through its first power outtage and my PC woke up without a scratch!

Cons: None so far

Manufacturer Response:

Hello,

Thank you for taking the time to post the review.

If you have any issues, please let me know.

XFX Support
neweggsupport@xfxforce.com

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

  • aaron h.
  • 1/12/2015 7:38:12 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsExcellent

Pros: Lots of pcix 6/8 pin connectors, flat cabling, fully modular

Cons: Motherboard connector could be a tad longer

Other Thoughts: Was very pleasantly surprised with this psu. Its very quiet without even havi g to turn on the alternative mode.

Manufacturer Response:

Thank you for the great Review. We appreciate the positive feedback.

If you have any questions, please contact us to let us know.

XFX Support

Neweggsupport@xfxforce.com

Play Hard!

Did you find this review helpful? Yes No

  • Anthony G.
  • 12/26/2014 4:49:28 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsGood while it lasted...

Pros: Fantastic Module Design
Sleek Look
Flat Cables

Cons: Died after 1 yr ~ 2 months ..

Downtime X Cost to Ship X Hassle of RMA > Buying New

Not Happy. Not XFX again.

Manufacturer Response:

Hello,

We're sorry you are having issues with your PSU. Have you tried another PSU to be certain?

Please contact us if you are having issues still, it is covered under a 5 year warranty.

XFX Support
neweggsupport@xfxforce.com

Did you find this review helpful? Yes No

  • Zach P.
  • 11/13/2014 6:53:14 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsExcellent Power Supply

Pros: I've had this power supply for about 6 months now, and it's fantastic. I had never used a fully modular power supply before this one, and they are amazing. This one came with every type of cable that I needed, all of them are of adequate length for my full size CM Storm Stryker, just an all around great power supply. Runs cool, plenty of power, never even had the slightest little hiccup with it.

Cons: I really can't think of anything

Manufacturer Response:

Thank you for the great review. We appreciate the positive feedback.

If you have any question, please let us know. neweggsupport@xfxforce.com

Play Hard!

- XFX Support

Did you find this review helpful? Yes No

  • Russell K.
  • 9/11/2014 11:37:02 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year

5 out of 5 eggsBest PSU on the Market

Pros: A Rebranded Seasonic X series. One of the best PSU you can buy. Top Reviewers Torture tested this Unit & rate it Flawless. This PSU outputs Full & clean power. It almost Qualifies for Platinum Rating. Nothing but the best.

Cons: None

Other Thoughts: If You have a Power Hungry system & SLI/Crossfire this is Your PSU. Even if You Don't, This PSU will last & 5 year warranty is a great deal Though most of you won't need the warrantyas this unit is as solid as it comes.

Manufacturer Response:

Thank you for the great review, we appreciate the positive feedback.

If you have any questions, please contact us at neweggsupport@xfxforce.com.

Play Hard!

Did you find this review helpful? Yes No

  • Michelle L.
  • 9/11/2014 9:32:13 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat PSU

Pros: Modular, hybrid fan mode, price

Cons: none

Manufacturer Response:

Thank you for the great review, we appreciate the positive feedback.

If you have any questions, please contact us at neweggsupport@xfxforce.com.

Play Hard!

Did you find this review helpful? Yes No

  • Salem S.
  • 8/14/2014 9:40:47 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsIT IS WORKING

Pros: GOLD Certified and and Full Modular Active PFC

Cons: As It work now ! No Cons

Other Thoughts: I fixed an Issue and it works good now .

Manufacturer Response:

Excellent. We are happy everything is working as expected.

If you have any questions, please feel free to contact us at neweggsupport@xfxforce.com

Play Hard!

Did you find this review helpful? Yes No

  • Roland L.
  • 8/14/2014 6:50:13 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsstill running strong.....

Pros: Modular...big plus for cable management
has a quiet mode switch like the Seasonic version....another big plus
suited my need just fine since my system is sort of juice hungry.

Cons: the cables were a bit stiff at first but loosened up after a little work.
other than that not much.

Other Thoughts: okay folks....this XFX PSU is nothing more than a rebranded Seasonic with XFX's labeling. Not that I'm knocking XFX but if you do a little research on PSU you'll find out Seasonic makes PSU's for a lot of companies. don't freak out okay.....it happens in the computer industry. I've had this PSU for over a year now and through several blackouts and little girls bumping the power cable. It keeps on taking it. I can't speak for the other people who seem to be getting bad power supplies but maybe they need to look at their systems needs with a thing called the PSU calculator.....came in handy for me to figure out how much I needed. I actually have more than I need but a little more never hurts right???

Take it from me....running on the edge of your power supplies capabilities is silly.....what happens when you put a load on it. Yep....fried power supply!!!!

Just take it from me.....look up PSU calculator.....there is a free one. I used that one to get an IDEA(key word there) on what I would need. then I went shopping from there.

Good luck.

Manufacturer Response:

Excellent. We are happy everything is working as expected.

If you have any questions, please feel free to contact us at neweggsupport@xfxforce.com

Play Hard!

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

  • Salem S.
  • 7/31/2014 8:22:08 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsdead after 5 min !

Pros: GOLD Certified and and Full Modular Active PFC

Cons: Dead after 5 Minute !
Just Started to install the OS and after first boot psu stopped to work .
I know it has warranty for replacement ! but it take time ....
So It was very bad memory !

Manufacturer Response:

Hello Navid,

We're sorry you had issues. Were you able to get your problems resolved?

if you have any questions, please contact us at neweggsupport@xfxforce.com.

Thank you

Did you find this review helpful? Yes No

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Item#: N82E16817207028
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