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Seasonic Prime ULTRA Platinum 850W Power Supply Review

Rating: 9.0.

Recently Seasonic updated their flagship PRIME Titanium and Platinum series of power supplies and today we take a look at another model in these ULTRA ranges – this time in an 850 watt capacity. Their expensive 1000W Ultra Titanium unit impressed us immensely, but is the cheaper 850W Platinum another unit you need to consider for a new system build?

It seems I am constantly singing the praises of Seasonic, but its impossible to actually find a bad unit in their portfolio. I don’t think I could say that about any other manufacturer. Their recent pairing with Phanteks will be interesting to watch in 2018.

Its worth pointing out that Seasonic supply these review units from Amazon so they can’t really be considered ‘golden reviewer samples’. They arrive at our doorstep in an immediately recognisable Amazon box we all know and love.

SSR-850PD (Ultra)

Technical Specifications
80PLUS® Platinum
Cybenetics Efficiency Level TBA
Cybenetics Noise Level TBA
Form Factor Intel ATX 12 V
Dimensions 170 mm (W) x 150 mm (L) x 86 mm (H)
Fan Information Fan Size 135 mm
Fan Control Premium Hybrid Fan Control
Fan Bearing Fluid Dynamic Bearing
Life Expectancy 50,000 hours at 40 °C, 15 % – 65 % RH
Cable Information Modularity Fully Modular
Cable type Flat black cables
Electrical Features Operating Temperature 0 – 50 °C (derating from 100 % to 80 % from 40 °C to 50 °C)
MTBF @ 25 °C, excl. fan 150,000 hours
AC Input Full Range
Protection OPP, OVP, UVP, OCP, OTP, SCP
Safety and Environmental Safety and EMC cTUVus, TUV, CB, CCC, BSMI, EAC, CE
Environmental Compliance Energy Star, RoHS, WEEE, ErP Lot 6, REACH
Warranty 12 Years

Review photography handled in house at KitGuru with a Leica S series medium format camera and S series prime lens. Please do not use any of the images within this review without express permission.

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