Enhance ENP-5136GH 360W PSU: A New 80 Plus Brand

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MP3 Sound Recordings of Enhance ENP-5136GH

Enhance ENP-5136GH @ <65W (<19 [email protected])

Enhance ENP-5136GH @ 90W (22 [email protected])

Enhance ENP-5136GH @ 150W (36 [email protected])

There was no need to make recordings at higher power levels; it's simply too loud.
Sound Recordings of PSU Comparatives

Seasonic S12-500 (Rev. A2) @ <90W (20 dBA/1m)

Seasonic S12-500 (Rev. A2) @ 150W (22 dBA/1m)

Antec Neo HE 430 @ <150W (21 [email protected])

Antec Neo HE 430 @ 200W (26 [email protected])

Zalman ZM460-APS @ 150W (26 [email protected])


These recordings were made with a high resolution studio quality digital recording system. The microphone was 3" from the edge of the fan frame at a 45° angle, facing the intake side of the fan to avoid direct wind noise. The ambient noise during all recordings was 18 dBA or lower.

To set the volume to a realistic level (similar to the original), try playing the Nexus 92 fan reference recording and setting the volume so that it is barely audible. Then don't reset the volume and play the other sound files. Of course, tone controls or other effects should all be turned off or set to neutral. For full details on how to calibrate your sound system to get the most valid listening comparison, please see the yellow text box entitled Listen to the Fans on page four of the article SPCR's Test / Sound Lab: A Short Tour.


With a better fan controller, the ENP-5136GH would have the potential to challenge the Seasonic S12 as the quietest power supply. In fact, with careful component selection, close attention to system airflow and a reasonable room temperature, it could well be quieter under real-life conditions. However, the steep curve of its fan controller prevents it from beating the S12 squarely. For medium and high-powered systems, the S12 will be quieter.

This is a pity, since the Enhance is otherwise a nice piece of work. As promised, it has tight voltage regulation, high efficiency, and an environmentally friendly, lead-free PCB. The cooling system seems to do a good job of cooling the unit itself, although the amount of heat exhausted into the system is a bit of a problem.

The biggest selling point of the ENP-5136GH — its 80 Plus certification — was a slight disappointment. We were unable to duplicate the 80% efficiency at 20% and 100% load certified by the 80 Plus. It doesn't miss by much, and the differences may be due to the tougher thermal conditions of our test rig. On the other hand, other 80 Plus approved models we've tested in he same way have all passed the the 80% efficiency specification.

Nevertheless, we welcome the Enhance ENP-5136GH into the ranks of high efficiency PSUs, and we hope that system integrators agree. The better it does in the industrial marketplace, the better the chance of it eventually trickling down into retail channels. And, when it does, it will be a good quiet power supply for low powered system. With Intel and AMD racing to improve CPU performance-per-watt, it might be all most of us will need in the future.

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Much thanks to Enhance USA for the opportunity to examine this power supply.

Discuss this article in the SPCR Forums.

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Items of Related Interest

POSTSCRIPT, March 23: Comments on this review from 80 Plus / Ecos Consulting

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