Cross-Load Tests and 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
There's a big chunk of this chart where the SF450 Platinum delivers more than 92% efficiency. It would be nice to see over 94% efficiency as well, even for a short period.
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).
As usual, the highest temperatures are measured on the VRMs responsible for generating the minor rails. The bulk cap doesn't get too hot. But the same can't be said for the array of caps near the VRMs. Because they're polymer caps, though, that shouldn't be an issue under real-world conditions. If they were electrolytics, we wouldn't be as confident about their reliability.
MORE: Best Power Supplies
MORE: All Power Supply Content