Enermax Galaxy 1000w Quad-SLI ATX PSU


Load Testing

In order for the results from all current and future PSU reviews to remain fair and comparable, Overclock3D uses a custom built Power Supply load stress tester. The tester will be placing the following loads on each of the Galaxy's rails:

  Idle Load
+3.3v Rail
+5.0v Rail
+12v1 Rail
+12v2 Rail5a15a
+12v3 Rail5a15a
+12v4 Rail5a15a
+12v5 Rail5a15a

As some power supplies produce obscure voltage outputs when running with 0% load, the Idle testing simulation will be produced by placing each rail under a small load similar to what would be expected from a mid-range PC. Load testing results are obtained by placing the unit under the maximum load selectable on the OC3D equipment without tripping the OLP (Over Load Protection) on the power supply.

Enermax Galaxy +3.3v Enermax Galaxy +5.0v

The Galaxy proved to have very stable voltage regulation on its +3.3 and +5v rails when placed under load. Little fluctuation was exhibited, with both rails remaining well within ATX specifications and a maximum droop of 0.04v.

Enermax Galaxy 12v1 Enermax Galaxy 12v2

Enermax Galaxy +12v3 Enermax Galaxy +12v4

Enermax Galaxy +12v5

Continuing the trend, the Galaxy shows good voltage regulation on all of the +12v rails, this time managing to keep fluctuation at or below 0.15v.

Efficiency Testing

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

Efficiency at Idle Efficiency at Load

At idle the Galaxy was placed under a total load of 383 watts with a recording of 465 watts consumption being obtained from the mains. Therefore the efficiency of the Galaxy 1kw at idle worked out to be 82.3%.

Increasing the load on the unit produced even more favourable results, with the Galaxy managing 84.8% efficiency when being placed under a total load of 1066 watts.

Noise Testing

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.

Idle Recording - Download
Load Recording - Download

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Most Recent Comments

14-12-2006, 08:23:32

"Having already reviewed a couple of 1000w+ units on the market, it seemed necessary to get hold of one of Enermax's Quad-SLI beasts to put through its paces. Does the Galaxy deserve all the attention it's been getting recently, we find out."


14-12-2006, 08:32:03

nice review and a pretty hefty psu. i see you point about the pre-fixed cables making it half modular but what 1000W pc wouldn't use all those cables anyway lolQuote

14-12-2006, 08:38:54

Originally Posted by name='llwyd'
nice review and a pretty hefty psu. i see you point about the pre-fixed cables making it half modular but what 1000W pc wouldn't use all those cables anyway lol
Yeah exactly. It would have been near impossible to impliment a sturdy modular system with all of those cables and remain 100% modular.Quote

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