Legit Power Supply Reviews

XFX 850W Black Edition Power Supply Review

Manufacturer: XFX
Product: XPS-850W-BES
Date: Wed, Dec 23, 2009 - 12:00 AM
Written By: Shane Higgins -
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The Test System

XFX 850w Black Editon power supply

Testing the 850w Black Edition took a little be more than what I had used in the past to test a PSU. My normal test bench hardly stressed the unit at all and it did not waver. So in talking to the Legit Reviews Editor in Chief, Nate, I got access to a pair of ATI HD5970’s. With a pair of these loaded up we knew we could make just about any power supply work hard.

The rest of the system is as follows:

Intel Test Platform
Component Brand/Model Pricing
Processor Intel Core i7 975 Click Here
Motherboard Asus P6T Deluxe V2 Click Here
Memory Corsair 6GB 1866 CL9 @ 1.65v --
Video Card 2x ATI HD5970 in CrossfireX --
Storage Drive Corsair P64 SSD
Click Here
Optical Drive
Asus SATA DVD ROM --
Power Supply XFX 850W Black Edition
Click Here
CPU Cooler
Titan Fenrir w/120mm fan Click Here
Other Thermaltake 760i Water Cooling Unit Click Here
Case Fans
4x 120mm fans
Click Here
Operating System Windows 7 Ultimate (64bit) Click Here

The system, with all the above, was left to sit running idle at the desktop, and voltages were checked at several places in the system: the main 24pin connector, video card connectors, and a 4pin molex connector. The reason for this was due to the fact we are comparing the XFX 850w Black Edition to the Cooler Master Ultimate UCP-1100W, an 1100W power supply that costs roughly the same amount of money at around $200, but has multiple 12v rails (6, to be exact). 

Then the system was run at 100% CPU load by running Prime95 Inplace FFTS, as well as the video cards being loaded up by running Furmark @ 1600x1200, all while playing a music CD in the DVD ROM Drive and all system fans at 100%. With the system humming along we then checked all the voltages again.

Next Page - Results and Conclusion


Review Index
Page 1 - The XFX Black Edition 850W PSU
Page 2 - Unboxing the Power Supply
Page 3 - A Closer Look
Page 4 - Moving Inside
Page 5 - The Test System
Page 6 - Results and Conclusion