Corsair SF850 ATX v3.1 PSU Review

Efficiency Normal, Light & Super-Light Loads

Efficiency is high at all load levels.

Average Efficiency

The platform’s average efficiency is high!

Average PF

The APFC converter needs tuning for higher PF readings at 230V.

Average Efficiency 5VSB

The 5VSB rail is highly efficient.

Vampire Power

Vampire power is low enough.

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3 thoughts on “Corsair SF850 ATX v3.1 PSU Review

  1. Hi, I have this PSU and it suffer to very loud coil whine when the GPU is used (benchmarks, gaming).
    Also sometimes I hear clicks from inside, for example when I run a benchmark.
    Do you think I should replace it?
    Thanks!

  2. Hello, I am in awe of your detailed reviews! Thank you for your work!

    About this power supply: so it’s safe to say it’s one of the best? The minuses you mentioned – do they cause any inconvenience for the average PC user? Or are they just your comments that the company could have fixed to make the power supply perfect?

    My build at the moment (with further upgrades to come):

    AMD Ryzen 9 9900X
    AMD Radeon RX 7800 XT 16GB
    G.SKILL Ripjaws M5 Neo RGB Matte Black
    DDR5 6000MHz 32GB
    NOCTUA NH-D15S
    WD Black SN770 1TB M.2 NVMe

    In the future I plan to change the processor and graphics card. I have very significant difficulties with the choice of power supply, because when you buy it – expect to work for a long time and without headaches).

    Translated with DeepL.com (free version)

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