Seasonic Prime Ultra Platinum 1000W PSU Review

Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the SSR-1000PD Ultra's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Test12V5V3.3V5VSBPass/Fail
10% Load6.3mV3.3mV5.3mV3.2mVPass
20% Load9.2mV4.8mV6.6mV4.6mVPass
30% Load10.7mV4.7mV6.5mV4.6mVPass
40% Load9.5mV7.7mV9.9mV6.9mVPass
50% Load8.1mV4.5mV6.8mV5.0mVPass
60% Load9.1mV4.6mV6.5mV5.9mVPass
70% Load10.6mV5.8mV7.0mV6.7mVPass
80% Load12.4mV5.7mV7.4mV7.3mVPass
90% Load13.4mV5.6mV8.1mV7.9mVPass
100% Load14.0mV6.3mV8.4mV8.5mVPass
110% Load15.1mV6.7mV9.6mV9.3mVPass
Cross-Load 17.8mV4.5mV6.6mV3.8mVPass
Cross-Load 214.6mV5.9mV8.2mV8.0mVPass

Seasonic's ripple suppression is superb, even without the use of in-cable caps. The company outdoes itself with this fresh Prime Ultra platform.

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-screen, the bigger the ripple/noise. We set 0.01 V/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

MORE: Best Power Supplies

MORE: How We Test Power Supplies

MORE: All Power Supply Content

This thread is closed for comments
3 comments
    Your comment
  • Th_Redman
    I notice you didn't give it an award rating...what gives, if you present it with such high praise?
  • Aris_Mp
    It has an award. It is just not shown, yet :)
  • Kennyy Evony
    Lets all hope it doesn't kill your motherboard and all components like my SeaSonic did while only operating 1 year under light workloads. No matter how much change they make to PSU I would not trust a brand that would allow catastrophic results in using their products AND not accept responsibility for the loss.