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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 deviations were calculated by taking the nominal values of the rails (12V, 5V, and 3.3V) as point zero. The ambient temperature was between at 30°C (86°F) to 32°C (89.6°F).
Load Regulation Charts
Naturally, the SPR-0850F-R's efficiency levels are not impressive, given that this is an 80 PLUS Bronze-rated unit.
Toward the end of the cross-load tests, we took some photos of the PSU with our modified FLIR E4 camera that delivers 320x240 IR resolution (76,800 pixels).
Our imager doesn't reveal any thermal issues when the PSU operates at normal ambient temperatures (30-32°C). This is good news, of course.
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Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.
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