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Rosewill Xtreme Series RX850-S-B - power supply - 850 Watt

alaScore 86

40 reviews

Apr, 2014

  • No negative mentions yet

alaTest has collected and analyzed 40 reviews from magazines and websites. Reviewers really like the usability. The value for money also gets good feedback, but comments are divided on the reliability.

value for money, usability

We analyzed user and expert ratings, product age and more factors. Compared to other Desktops the Rosewill Xtreme Series RX850-S-B - power supply - 850 Watt is awarded an overall alaScore™ of 86/100 = Very good quality.

Review analysis

(Based on 40 reviews)

User Reviews  

Showing 40 review(s)

Expert Reviews User Reviews
Showing 1 - 10 of 40 Show Reviews: in English

Consumer review by:

finally died


i bought this in 2008 or my first gaming pc build. in 2010 i built my super gaming machine and gave my parents (who were running a 2003 dell with a p4) my 2008 build. today after 6 years of service it has finally died. impressive to say the least.

quiet looks good and powerful

no modular cabling (well i bought this in 2008 with my first pc build)

Consumer review by:

Got my moneys worth I think


It's a good PSU. There's better ones but nothing wrong with this one.

Worked great for about 3 years. Heavy usage. At least 15 hours a day or more

Just stopped working one day after about 3 years of heavy use. I've seen PSU's last longer but I feel I got my moneys worth out of this one

Consumer review by:

2 Years and still running


I don't see why people are saying this isn't good for gaming or anything. Currently her setup: -ASUS M5A87 AM3+ AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard -AMD Phenom II X6 1100T Black Edition Thuban 3.3GHz, 3.7GHz Turbo Socket AM3 125W Six-Core...

This unit has served my fiancee very well for the past 2 years. No, she isn't a facebook gamer but an actual gamer. She plays anything from Sims 3 and smaller games up to Battlefield 3, Skyrim, Crysis 1-2-3, and many others. This unit has held for this...

Not a single one...Wish it was modular, but meh, this is the one she picked out, so good for her :)


Consumer review by:

Rosewill RX850-S-B


Good when it actually works fine

Shuts off randomly every few hours. Almost impossible to play any game without letting it cool down for awhile before I turn my computer back on

Consumer review by:

Received Defective Unit


Defective unit as indicated by flickering LED light which would precede a complete shutdown. Turning back on would often reveal data corruption on standard SATA hard drives. Testing showed instability and fluctuation in 3.3 and 12v rails. Seems to be a...

Quiet Operation

problems with unstable voltages ; received defective unit

Consumer review by:

Disappointed in this PSU


I wish I had bought a higher quality PSU like Antec in the first place.

The PSU looks nice, the LED lighting is a good addition. It has plenty of connectors for most any computer needs

I returned my first one after believing it was defective because the LED light flickered and the unit clicked every few seconds. It caused hard resets on my computer while playing some games as well. After receiving my replacement, I noticed the same...

Consumer review by:

Broken on delivery


Waited too long for a refund so now I'm working with Rosewill on the warranty side. Will update when I receive the new power supply.

Don't know of any

As soon as I hooked everything up and fired the pc up I got the same error as Daniel. Power Surge detected and immediately restarted my pc. I disabled the feature because my computer ran fine until I ran a game. Any game no matter the gpu requirements...

Consumer review by:

waist of money


i would not recommend this power supply at all. Bought this in March of 2013 and now having to replace it.

was a good price but not worth the money and the headache we are having now with the unit

Power unit will cause unstable surge and the motherboard will detect the unstable surge and shut down. Some times it takes two or three restarts before the computer will finally boot completely

Consumer review by:

Don't waste your time


Don't waste your money, its a power full unit but its seems your chances of getting a working one are slim. Others out there for the same price that are just as good.


It was defective. It powered up my PC and every 20 minutes or so my PC would restart and give an error message claiming unusual power surges were detected

Consumer review by:

Good Supply


If this power supply keeps working in 2 years I'll keep it for my next build.

Plenty of cables ; Powered all components aquatically

Died after 2.5 years of use. She just wouldn't turn on one day. I contacted new egg and they replaced my power supply right away

Product Specifications

Rosewill Xtreme Series RX850-S-B supports ATX12V v2.2 and EPS12V v2.91 standards, and both Intel and AMD Systems as well. Four 12V rails provide independent reliable power. Active Power Factor Correction (PFC) provides clean and reliable power to your system.

Dimensions & Weight



Product Type:Power supply
Subcategory (AG):Power supplies


Packaged Quantity:1
Product Line:Rosewill Xtreme Series

Power Device

Form Factor (AG):Internal
Output Connector Qty:21
Power Provided:850Watt
Power Supply Compatibility:PC/Server

Service & Support

Type:3 years warranty