Date: December 28th, 2006
Article by: Joe Anderson (Hardware Reviewer)
Edited by: Nathan Glentworth (Owner / Head Editor)
Product was submitted by: OCZ Technology
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PRODUCT PICTORIAL AND WALKTHROUGH (cont'd)
NOTE: Opening the case on any PSU will likely void your warranty and can be very dangerous! There can be some serious voltage stored here! Do not try this at home!
Quality components and massive heatsinks are visible once the case is opened up. The cables are sleeved well into the case giving not only a professional look but some added protection as well.
While I'm unfamiliar with this fan manufacturer, a quick search showed that this model fan shows up in many quality power supplies and the manufacturer lists it at 2500RPM and 38dBA. We'll discuss the sound level later, but now let's button this PSU back up and do some testing.
PRODUCT INSTALLATION & TESTING
Let me preface this section by saying that I don't have the kid of sophisticated (and expensive) electronic test equipment needed to fully and selectively load a power supply. For this review, I've chosen a DFI LanParty SLI-DR motherboard because it's notoriously finicky about the power fed to it.
The testbed consisted of the following:
AMD Opteron 165 processor @ 2.8 GHz
DFI Lanparty UT nF4 SLI-DR motherboard
eVGA 7900GS KO
OCZ 5002048ELGE-K (1024mb X 2) memory
OCZ GameXStream 850W PSU (model OCZ850GXS)
Western Digital WD800 SATA hard drive
LG CDRW/DVD Combo drive
Testing was done using the open frame shown above and consisted of monitoring voltages from the +3.3V, +5V, and +12V rails while running multiple passes of Prime95 on both cores and playing a few rounds of UT2004. Voltages were monitored with a digital multimeter. I was pretty impressed with the results, in light of the high demand of the components and the power-sensitive motherboard. Over several days of testing, including overclocks exceeding 50%, rails were rock stable and not one power issue reared its ugly head.
Random checks with the multimeter throughout several days of testing yielded the following results:
I tested the Toughpower 850W every way I could think of and I couldn't get it to budge off of these numbers. I wasn't able to hear the PSU over the CPU and chipset fans at any time during testing. While not truly silent, it's plenty quiet enough for its target audience. The fan seems to be thermally controlled and barely spun (and didn't light up the LEDs) until it had been powered on for some time.
Stability was very impressive throughout testing and, aside from the +12V rails being very close to running out of spec, the voltages were acceptable. I'd really like to see the +12V rails a bit lower, but they were virtually identical to each other.