Super Flower Leadex Platinum 550W PSU Review

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Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the rails of the SF-550F14MP unit. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).

Swipe to scroll horizontally
15.2 mV5.0 mV6.2 mV4.8 mVPass
24.9 mV6.3 mV7.7 mV5.2 mVPass
35.9 mV6.6 mV7.8 mV5.6 mVPass
46.7 mV6.7 mV8.3 mV5.4 mVPass
58.0 mV6.5 mV9.3 mV6.2 mVPass
67.7 mV7.0 mV9.4 mV6.4 mVPass
77.4 mV7.1 mV9.7 mV7.1 mVPass
87.5 mV8.1 mV9.8 mV8.7 mVPass
98.1 mV9.5 mV11.3 mV10.0 mVPass
109.9 mV9.7 mV13.5 mV11.2 mVPass
1110.0 mV9.9 mV14.2 mV12.0 mVPass
CL16.7 mV17.7 mV9.8 mV10.3 mVPass
CL29.2 mV9.3 mV13.2 mV9.3 mVPass

Ripple suppression is jaw-dropping on almost all Super Flower implementations and this Leadex unit is no exception. The +12V rail didn't exceed 10 mV of ripple, while the 3.3V and 5VSB rails were within 10 mV and 15 mV in worst-case scenarios. As you can see from the table above, only the 5V rail exceeded 15 mV of ripple and this took place only during the highly unrealistic Cross-Load 1 test. Super Flower managed to beat even the mighty Delta Electronics in the ripple performance section, while Seasonic has to increase its efforts in order to catch up, although both aren't far behind.

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 0.01V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.

Ripple At Full Load

Ripple At 110-Percent Load

Ripple At Cross-Load 1

Ripple At Cross-Load 2

Contributing Editor

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

  • laviniuc
    you mean P2, right?

    "This means that we will most likely see an EVGA SuperNOVA 550 T2 unit in the near future."
  • envy14tpe
    The 650W version sells for $85usd (here in Taiwan) and 750W for $100. Not sure why this company doesn't sell more internationally since it is at the top tier. As it is known for quality. Gonna be picking up a SuperFlower PSU with my next build.
  • MasterMace
    Last page error: a 10C increase is not a 50F increase.
  • Aris_Mp
    this is why I avoid putting F in my articles :)
  • blazorthon
    Google will gladly do the conversions for you :D
  • Aris_Mp
    actually it did and still says that 10C is 50F.
  • casey_souder
    actually it did and still says that 10C is 50F.
    A change of 1 degree C equals a 1.8 degree F change. Google is doing a temperature conversion, not a unit conversion.
  • Roj Number 1
    Yes, 10C = 50F, but a 10C increase in temperature is a 18F increase in temp. Two different things.
  • Aris_Mp
    you are right of course. Thanks! Just my mind got stuck.
  • FritzEiv
    I forgot to tell you, Aris, there WILL be math.