Seasonic Prime ULTRA Platinum 850W Power Supply Review

1. Introduction2. Bundle & Cabling3. External4. Internal5. Methodology and Testing6. Closing Thoughts7. View All Pages

Seasonic are using a Hong Hua Fluid Dynamic Bearing Fan (FDB) (Model HA13525H12F-Z). This ‘H' model is rated to spin slightly faster than the ‘M' model used in the Ultra Titanium 1000W model (2,000 rpm v 1,800 rpm). This is likely partially related to the efficiency of the units.

Below - a High Resolution Gallery of the internal layout of the Seasonic ULTRA Platinum 850W

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Interestingly, we reviewed the Seasonic Prime 850W Platinum supply back in March 2017 HERE and we can see that in the older non ‘Ultra' version Seasonic were using two Japanese 105c 400V 330uF capacitors. This total of 660uf has been increased in the new version of the unit we are testing today. Seasonic have in fact increased the capacity of one of the primary capacitors to 470uF with a 330uF supporting it. This brings a total of 800uF to this new version (140uF more).

Soldering quality in the supply is first class and Seasonic are using brands such as Rubycon, Nichicon and Nippon Chemi Con on the boards. All good brands.

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