OCZ Fatal1ty 750W Power Supply
Author: Zahn Funk
Editor: Shawn Knight
Date: 07-22-2010
Provided by: OCZ
Pages:
Installation / Testing

I'm installing the OCZ Fatal1ty 750W power supply with the following hardware:

AMD Phenom II 1090T X6 BE
MSI 890FXA-GD70
Kingwin XT-1264
2x2Gb Crucial Ballistix Tracer DDR3-1600
Diamond Radeon HD5850
128Gb Crucial C300 RealSSD
Icy Dock 2" Adapter
1Tb WD Caviar Black
Optiarc 24x DVD+/-RW
Cooler Master HAF 932 AMD Edition


Although the HAF 932 case allows for either top or bottom mount power supply locations, I've opted to install it at the bottom, with the lighted fan facing up for aesthetic reasons. All cables were routed behind the motherboard tray using available access holes where possible, and although the primary ATX cable was a bit tight it did reach without problem. The +12v EPS cable required an extension, however this has been true of every other power supply used in the HAF 932, and Cooler Master includes one with the case accessories. The flat modular cables have plenty of flexibility across the width of the jacket of course, but getting them to bend sideways presents a problem. There is a short length of exposed wiring on either side of each connector to allow for sharper twists and turns. The thermally-controlled fan operates noiselessly and although not detailed in OCZ's specifications, will continue to operate for up to two minutes after powering off the system in order to further cool the components.


Using a Kill-A-Watt meter I measured total system load at the AC outlet to be just under 100W at idle, and up to 440W with the OCCT power supply test utility, which maximizes both CPU and GPU load. Graphed as a percentage of power supply capacity, the system is utilizing less than 15% at idle and under 60% when fully loaded. As 80Plus Bronze certification requires greater than 82/85/82 efficiency at 20/50/100 percent load, the 750W trumps earlier Fatal1ty models which only carried the standard 80Plus rating.


During testing I also took voltage readings using my Fluke multimeter at the back of the connector, and graphed the results above. All of the rails did measure a slight voltage drop going from idle to load, however this was determined to be 1% or less of their rating, and at no time did any of them fall below specification. While under load conditions, voltages fluctuated by as much as +/-.02v, again not a huge concern but also not quite as stable as some other power supplies we've tested.

Let's wrap things up with some final thoughts and conclusion.


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