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

alaScore 87

49 reviews

Oct, 2014

  • No negative mentions yet

alaTest has collected and analyzed 49 reviews from magazines and websites. People are impressed by the reliability. The usability also gets good feedback.

price, usability, reliability

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 87/100 = Very good quality.

Review analysis

(Based on 49 reviews)

User Reviews  

Showing 49 review(s)

Expert Reviews User Reviews
Showing 1 - 10 of 49 Show Reviews: in English

Consumer review by:

A+ works great


Would buy it again

Gives ample power to all my drives and devices I have hooked up not to mention it looks nice for a power supply

Internal temprature of tower case warm not sure if video card or power supply or mobo/cpu not risking overclocking had to turn overclocking off it got so warm in my steel tower

Consumer review by:

I really wanted to like this thing..


I read many reviews on this psu before I purchased it and I have it a chance after seeing mostly good reviews. I wanted to like this product but sometimes I guess you just get a bad one. I'll probably keep it for a spare or a future lower power project.

Fan is quiet, lights add a nice touch to the computer

This psu only worked consistently for about 7 months. Recently while playing games, specifically Assassins Creed 4, my computer started randomly restarting. I figured out that my power level was dropping after a while and it would cause my computer to...

Consumer review by:

looks good and works great


high output for a low price, looks good with its blue led fan, tons of connecters

not modular


Consumer review by:

SIX AND A HALF YEARS and still going strong


I bought this right at the beginning of 2008. It has outlasted three computers, each of which used SLI and heavy water cooling and overclocking, I just keep putting it in the new ones. Nothing has rusted, the fan is as silent as the day I installed it,...

There are no cons. It's a perfect power supply

Consumer review by:

Long Lived and Still Kickin'


I purchased two of these in 2010 (4 years ago) for my computer and one for my sister. Both are still kicking and one of them I've just sold for a new upgrade. Have not had a single issue with these Rosewill PSU's. They are a great value and I would be...

Strong Steady Voltages ; Looks Great ; Lots of Plugs ; Plenty of Cable Length (mostly - see Cons)

The CPU 4/8 pin power cable could be longer. Had this bottom mounted in an Antec 900 and it was a stretch to reach the board connector

Consumer review by:

Failed after 7 months


This power supply started to cause my PC to reset constantly with no warning. At times it would work for normal use, but when a game was fired up, PC would restart. Heating is no issue. I ran many checks and constantly monitored. I replaced this power...


CPU power cable is not long enough for a full tower

Consumer review by:



would buy again

price ; cable length ; molex - which i dont use, but if you did it has it ; plenty of extra cables for lots of components ; the sleeved cables are nice ; over a year use and still strong

not being modular is really only the con

Consumer review by:

Not Compatible with Wii U Control Pad


would buy again

price ; cable length ; molex - which i dont use, but if you did it has it ; plenty of extra cables for lots of components ; the sleeved cables are nice ; over a year use and still strong

not being modular is really only the con

Consumer review by:

Four Years of Solid Performance


I would definitely buy another, if it was modular. I loved the blue lighting (though not the obnoxious flickering as it breathed it last gasps these past few weeks), as it worked great with the rest of the blue lighting that came with the case. As it...

I purchased this PSU in December of '09, and it failed me today, May 31 2014. It was a rock solid power supply, delivering stable power through some pretty adverse conditions. I left my PC on for weeks, sometimes months at a time. It kept going through...

It finally gave out on me. My SATA rails went first, corrupting two 2TB data drives and eating my linux install SSD. Then the fan gave out, and no amount of cleaning would get it to spin again. After that it was inevitable that it would shut down from...

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)

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