Skip to main content

NZXT E Series 850W PSU Review: An Analog Platform With Digital Enhancements

Cross-Load Tests & Infrared Images

Our cross-load tests are described in detail here.

To generate the following charts, we set our loaders to auto mode through our custom-made software before trying more than 25,000 possible load combinations with the +12V, 5V, and 3.3V rails. The load regulation deviations in each of the charts below are calculated by taking the nominal values of the rails (12V, 5V, and 3.3V) as point zero. The ambient temperature is between at 30°C (86°F) to 32°C (89.6°F).

Load Regulation Charts

Image 1 of 3

Image 2 of 3

Image 3 of 3

Efficiency Chart

From 140W to around 590W on the +12V rail, NZXT's E850 delivers more than 90% efficiency (even with increased load on the minor rails). But it would be nice to see a region, even a small one, with efficiency exceeding 92%.

Ripple Charts

Image 1 of 4

Image 2 of 4

Image 3 of 4

Image 4 of 4

Infrared Images

We apply half-load for 10 minutes with the PSU's top cover and cooling fan removed before taking photos with our modified FLIR E4 camera that delivers 320x240 IR resolution (76,800 pixels).

Image 1 of 11

Image 2 of 11

Image 3 of 11

Image 4 of 11

Image 5 of 11

Image 6 of 11

Image 7 of 11

Image 8 of 11

Image 9 of 11

Image 10 of 11

Image 11 of 11

The bulk caps stay close to 50°C, while the polymer caps on the DC-DC converters go up to 60°C. In general, temperatures inside the E850 stay pretty low, so there's plenty of headroom for a more relaxed fan profile.


MORE: Best Power Supplies


MORE: How We Test Power Supplies


MORE: All Power Supply Content