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SilverStone Strider Platinum ST85F-PT PSU Review

SilverStone's Strider Platinum series offers compact dimensions along with Platinum efficiency and a fully modular cable design. The 850W member of this line will be evaluated today. Its strong card against the competition is the 471W power density score.

Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the ST85F-PT's rails. The limits, according to the ATX specification, are 120 mV (+12V) and 50 mV (5V, 3.3V and 5VSB).

Test12V5V3.3V5VSBPass/Fail
10% Load6.5 mV8.6 mV6.8 mV5.1 mVPass
20% Load7.4 mV10.2 mV7.0 mV7.2 mVPass
30% Load8.9 mV11.6 mV8.2 mV8.8 mVPass
40% Load10.6 mV14.8 mV10.0 mV12.0 mVPass
50% Load12.6 mV16.8 mV11.6 mV14.1 mVPass
60% Load14.8 mV17.7 mV13.3 mV14.0 mVPass
70% Load18.7 mV18.2 mV15.1 mV17.4 mVPass
80% Load23.7 mV18.6 mV17.3 mV18.2 mVPass
90% Load29.0 mV18.3 mV16.7 mV20.6 mVPass
100% Load34.9 mV22.0 mV21.2 mV25.2 mVPass
110% Load48.6 mV36.5 mV34.8 mV42.2 mVPass
Cross-Load 18.3 mV10.5 mV10.2 mV8.1 mVPass
Cross-Load 234.8 mV22.0 mV19.9 mV24.2 mVPass
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Ripple suppression at +12V isn't the best we've seen, but it's good enough. You have to push the PSU beyond its rated limits to see over 40 mV ripple on this rail. On the minor rails, ripple is quite low, and the 5VSB rail delivers clean output even under full load.

Ripple Oscilloscope Screenshots

The following oscilloscope screenshots illustrate the AC ripple and noise registered on the main rails (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the screen, the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals 0.01 V) as the standard for all measurements.

Ripple At Full Load

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Ripple At 110-Percent Load

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Ripple At Cross-Load 1

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Ripple At Cross-Load 2

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Aris Mpitziopoulos
Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.