Corsair RM850x V2 PSU Review: Smaller And Quieter!

Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.

Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the RM850x’s rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Swipe to scroll horizontally
10% Load5.1mV5.2mV10.3mV5.8mVPass
20% Load10.4mV3.9mV9.4mV5.0mVPass
30% Load7.6mV5.3mV9.3mV5.7mVPass
40% Load7.4mV13.4mV14.6mV13.7mVPass
50% Load6.4mV5.8mV9.9mV6.1mVPass
60% Load6.9mV7.1mV10.1mV7.4mVPass
70% Load6.9mV6.8mV10.0mV7.2mVPass
80% Load6.7mV6.6mV10.2mV7.1mVPass
90% Load7.1mV6.6mV11.2mV7.5mVPass
100% Load7.8mV8.7mV11.6mV10.1mVPass
110% Load7.8mV9.3mV11.9mV9.4mVPass
Cross-Load 110.8mV8.5mV12.0mV9.1mVPass
Cross-Load 27.0mV8.1mV12.2mV8.8mVPass

Ripple suppression is great on every rail! The PSU's solid platform, along with cables featuring extra ripple-filtering caps, lead to an amazing performance.

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 0.01V) 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

Contributing Editor

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

  • parkerygc8
    Sweet, first review of this I've seen. Thanks.
  • leclod
    I didn't go into detail, but I wonder what's the use of that Gold PSU when there's a Seasonic Focus Plus Platinum 750 for a similar price ?
  • Aris_Mp
    Gold, Platinum, it doesn't really matter at this efficiency point. What matters the most, in my opinion at least, is noise output now besides the basic (reliability and overall performance).
  • powernod
    At last some scoring at the review conclusion!! I always considered the lack of score as Tom's greater weakness about their reviews !!