Silver Power GuardianX 1000w SP-1000E ATX PSU

Test Results

Load & Efficiency Tests

To provide our readers with the most accurate results, Overclock3D uses a custom built PSU load tester on all reviews. This not only gives much more reliable results than the testing methods employed by other sites, but also allows for all current and future review results to be compared side-by-side.

Efficiency tests are performed by measuring the wattage consumed by the power supply at the mains (Mains Draw) against the power consumed by the OC3D power supply stress tester (PSU Load). These results may not be 100% accurate, but have proven to be extremely close to results obtained from professional equipment.

  0% 50%100%
+3.3v Rail
0w66w 99w
+5.0v Rail
0w50w 100w
+12v Rails
Total0w 476w 919w

Silver Power GuardianX 100w Load Test

All of the rails remained reasonably stable during testing, with the +3.3v showing by far the best stability and not moving from 3.36v regardless of load applied. The +5v rail suffered a slight dip of 0.13v from the 0% to 100% load tests, with each of the +12v rails taking around a 0.28v drop under full load.

Certainly not bad results for a budget unit placed under a hefty 919w load, and well within ATX specifications throughout.

Silver Power GuardianX 1000w Efficiency

Silver Power rate the GuardianX at 85% efficiency. If I'm honest I wasn't expecting the unit to get anywhere near this. However, during the testing at 50% and 100% load levels our resuts showed that the SP-1000E was reaching at least 84% efficiency and even managed almost 84.5% when under 100% load. A very impressive result indeed.

Temperature Testing

In our continuing efforts to make power supply reviews more thorough, rather than simply checking voltage stability, Overclock3D will now be recording the temperature of each PSU as it undergoes testing. Temperature recordings are taken from the inside of the PSU at 0%, 50% and 100% load levels using a laser infrared thermometer. These readings should give us a good idea how much heat is likely to radiate into the end-users case.

Silver Power GuardianX 1000w Temperature Tests

For a 1000w power supply contained within an average sized ATX case and cooled by a single 80mm fan, the SP-1000E manages to stay extremely cool. With the internal components reaching just under 40°C when placed under full load, it's fairly safe to say that very little heat will be dumped into your PC case while using this PSU.

Noise Level Recordings

Possibly the hardest part of any PSU review is summarising the level of noise given out by the unit. The threshold for what is considered 'noisy' varies from person to person and therefore what I may consider a quiet unit, another person may consider extremely loud. A common way to resolve this issue is to use a dBA meter to measure the units noise level, however this doesn't take into account the pitch (type) of noise emitted and whether it is likely to irritate end users.

For this reason OC3D records all power supplies at idle and load in wav format for you to make your own informed decisions. All recordings are taken at 30cm away from the PSU and outside of a PC case. You will need to remember that noise levels will be reduced by varying amounts once the PSU has been installed inside your PC enclosure.

0% Load Recording - Download
50% Load Recording - Download
100% Load Recording - Download

Under full load I found the GuardianX to be surprisingly silent. Normally high-output units fitted with 80mm fans are extremely loud as the fan needs to rotate at full speed in order to combat the increasing temperature. Although maybe not ideal for HTPC or SilentPC users, the SP-1000E certainly won't stand out in the average PC.
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Most Recent Comments

16-05-2007, 10:34:54

wow thats some mad results from such a new company and for such a price

nice review as always dudeQuote

16-05-2007, 11:07:38

Amazing results TBH... Would have never guessed.Quote

16-05-2007, 11:22:03

Looks like a totally solid performer Quote

16-05-2007, 11:43:26


That is one awesome PSU and one of the hook review! Quote

16-05-2007, 12:05:59

I have read the review twice and could not see the price anywhere, could someone tell me what it is please, I am getting some sleep before reading it again.Quote

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