Corsair SF450 Platinum SFX PSU Review: Best of the Best

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

Efficiency Chart

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.

Ripple Charts

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).

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.

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  • SR-71 Blackbird
    I run a SF600 Gold in one of my setups. To improve on that is awesome. Thanks for the review Aris!
  • Brian_R170
    Nice to see more quality PSUs available for small form-factor cases. The included ATX-to-SFX adapter is welcome addition, but I prefer the flat non-sleeved cables found on the SF450 Gold in small cases where space to bundle cables is limited.
  • TripleHeinz
    I've been running for 3 years in a row, almost every single day with the PC on, a FSP FSP300-60GHS-R SFX PSU in my custom-made mini ITX system. It is rated at 300W, 80 plus, 80mm fan with sensor, completely silent, comes with an ATX bracket+cable+screws, user manual plus nice box, a total marvell. I think it is a very respectable PSU (good internals) if you ignore the standard satin gray color.

    Well I'm here to say that the Corsair SFX PSU is very impressive but for that price you'll have to justify the buy with a very specific purpose of your own. I can only recommend the FSP SFX PSU, the 300W model (the 450W model is said to be loud), it is more than enough for HTPC and low power ITX parts (and midrange hardware as well: I5 + GTX1060).

    Disclaimer: I do not work for FSP ;p
  • jayjr1105
    Great review. Amazing these SFX's getting so good even with less room.

    May I suggest the latest Rosewill Capstone M lineup by Andyson for a future review. The previous Superflower and Enhance units were well reviewed but they switched to the Andyson GX platform. Thanks!