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Item#: N82E16817207017

XFX PRO850W XXX Edition Semi-Modular 80 Plus Silver Certified 850 Watt Active PFC Power Supply

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  • ATX12V / EPS12V
  • 90 - 264 V
  • 80 PLUS SILVER Certified

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Conventional PSUs use multi-rail technology which basically combines cheaper and lower wattage PSUs into one single PSU to generate a higher total wattage. However, smaller rails have lower maximum wattages so left over wattage on individual rails become too small to handle major components and gets wasted.

Unique, continuous EasyRail technology enables you to maximize available power and make set-up easy. Stack numerous power-hungry components, such as your GPU, CPU and other components - without fear of crashing – with XFX ProSeries PSU with EasyRail Technology. In addition, this XXX Edition PSU has been awarded the 80 Plus Silver certification for its high power efficiency and is also designed for NVIDIA SLI and AMD CrossfireX multi-GPU systems, making it a perfect solution for hardcore gamers. One Rail, One Setup.

  • newegg EasyRail Technology XFX ProSeries PSUs with EasyRail Technology give you one continuous rail of power covering the total maximum wattage. What this means is that no matter how many devices you have, high or low power, they can easily stack until it reaches the full maximum wattage. With EasyRail technology you can maximize the potential of your PSU with ease.
  • newegg True Wattage Guarantee Wattage and heat go hand-in-hand. Other PSUs claim a certain wattage by using unrealistic testing environments, but in real settings, they might reach much lower wattages. XFX PSUs guarantee the advertised wattage, even at well above standard operating conditions at 50°C.
  • newegg Efficient Power Use 80 Plus Silver certified means that this XFX PSU has up to 88% power efficiency. Compare that to non-certified PSUs, which lose at least 20% of power drawn. With the XFX PSU, get every watt you pay for.
  • newegg Extreme Heat Tested Capacitors Internal PC operating temperature is around 35°C but the internal PSU temperature can be much higher. XFX uses high-quality Japanese brand capacitors rated to withstand up to 105°C. While some competitors claim to use Japanese capacitors, they may only be rated for 85°C, which can shorten the usable life of a PSU.
  • newegg Clean Power Power drawn from your AC outlet is typically dirty with voltage spikes and fluctuations, which can harm vital PC components. XFX PSUs are designed to deliver tight DC voltage regulation with minimal AC ripple, giving you safer, cleaner power.
  • newegg High +12V Output & Multi-GPU Technologies Supported The 850W XFX ProSeries XXX Edition semi-modular PSU features DC to DC converter design and a high +12V output of up to 70A to ensure the maximum compatibility and provision of 12V power. It is also AMD CrossfireX ready and NVIDIA SLI Ready certified and comes with 4x PCI-E 6+2-pin connectors, allowing you to build your ultimate multi-GPU gaming power house.

Learn more about the XFX P1-850B-NLG9

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-NLG9

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  • Matthew T.
  • 2/24/2015 8:24:44 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsStrong, Sleek, and Sexy

Pros: Semi Modular
Silver Cert
Plenty of juice.
Cable management

Cons: Semi Modular (Not like they don't advertise it as such though)

Other Thoughts: The 8-pin was a bit short for my Case/Mobo combo (Corsair Carbide 500r and ASRock Z77 Extreme 4), but nothing that a 5 dollar extender won't fix. 5/5 no problem.

Manufacturer Response:


Thank you for taking the time to write this review, we appreciate your feedback.

If you have any issues, please let us know.

XFX Support

Did you find this review helpful? Yes No

  • Benjmain H.
  • 1/2/2015 11:40:23 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsMy first PSU

Pros: I bought this card from newegg around Christmas 2011. It's still in my main rig and runs everything I need it to! The modular design made it nice for cable management by getting rid of unnecessary wires

Cons: NONE! The XFX psu units now come with a cool alien green color which I wish I had but this isn't really a "con" :)

Other Thoughts: Slick style, it still looks great in my case almost 4 years later!

Manufacturer Response:

Awesome. Thank you for the great review. We are happy you are pleased.

If you have any questions, please let us know.

XFX Support

Did you find this review helpful? Yes No

  • Uriel E.
  • 7/27/2013 5:43:55 PM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsLove this PSU no issues

Pros: Great PSU does everything. Very quite I have it running 24 hours a day for over a year

Cons: Not fully modular

Manufacturer Response:

Thank you for the great review! If you ever have an issue with this PSU, or a question, please contact our XFX Support team at

Play Hard!

Did you find this review helpful? Yes No

  • jeff k.
  • 6/8/2013 8:44:43 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsXFX PRO

Pros: This power supply rocks.......runs my gaming comp and has plenty to spare.

Cons: none

Other Thoughts: VERY HAPPY

Did you find this review helpful? Yes No

  • Kyle G.
  • 4/23/2013 7:55:51 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsDying fan

Pros: Semi modular
Never had any power related issues
Looks good in the case

Cons: After owning the PSU for about 3 months, it developed a very irritating fan ticking noise. I understand that occasional lemons will slip through the cracks, but a quick google shows that this seems to be a pretty common problem with XFX's XXX series. Whether they cheaped out on the fan, are slipping in quality control, or this is just a widespread fluke, I couldn't say.

But I do know that I can't eat the 2-4 weeks of RMA downtime when my income relies on working from home. If XFX could implement an advanced RMA policy similar to EVGA or Corsair, that'd be swell.

Also, the cables feel a bit too short, but my case is huge so that isn't entirely their fault.

1 out of 2 people found this review helpful. Did you? Yes No

  • Ben C.
  • 3/30/2013 10:55:38 AM
  • Ownership: 1 month to 1 year

5 out of 5 eggsExtreme power

Pros: I was lucky to stumble on this on a 1-day sale at for $100 a few weeks ago. My old 850w psu wouldn't even turn my new computer on. I didn't know that other psu features matter besides the wattage. My old psu only had 15a on the +12v rail, this psu has 70a. So far it's been more than enough to power my Intel 4core cpu, tv tuner card, 2gb 256-bit pcie3 video card, wifi card, 35ft hdmi cable, & other things all at the same time flawlessly.

Cons: none

Did you find this review helpful? Yes No

  • David M.
  • 3/5/2013 9:45:00 PM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsThe Way to go

Pros: Everything, I Bought this PSU in dec 2011 and boy, what a great choice I made. Not a single complain from my end.

Cons: NONE!

Other Thoughts: If you need a grear PSU for SLI or Firecross, this is a good contender.

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

  • Parker C.
  • 12/28/2012 8:12:23 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsAwsome PSU!

Pros: Awesome PSU. Does what it's supposed to. Cables have nice and thick casing. The unit is made of solid material. Great power-on-demand feature, using less power on this than my old smaller wattage PSU.

Cons: Wasn't free?

2 out of 3 people found this review helpful. Did you? Yes No

  • Cory I.
  • 12/12/2012 11:04:02 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsA great PSU

Pros: Great adapter choices, the non modular cables they come with are rather good choices though i did not have to use all of them. the price was well worth 4 eggs.

Cons: cables were really stiff and the power supply its self is rather big.

Did you find this review helpful? Yes No

  • Nathan T.
  • 11/22/2012 2:40:50 PM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsFlawless

Pros: +No noise whatsoever (no fan noise either). I spent a lot of time finding a PSU that was completely silent.
+Never had any problem. (Has resided in multiple houses, one being very old with subpar currents..lights flickered but computer didn't show any issue)
+Fully modular
+Single rail (no worries)
+Sleeved cables
+Great packaging
+Styling of PSU is perfect
+Future proof
+Fan is so silent the only indication that it's running is a small amount of dust in my filter after 1 year!
+Very solid/high quality feel
+Smells great lol
+Plethora of extra cables

Cons: -Cables are somewhat stiff
-Not a big deal but each cable has stickers on it that I cut off to have a clean look..leaves small amount of residue on the sleeve which collects dust

Other Thoughts: -Would have been nice (although I've never seen it on a market PSU) to have every individual cable sleeved

1 out of 2 people found this review helpful. Did you? Yes No

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Item#: N82E16817207017
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