Thermaltake Toughpower DPS G RGB 850W PSU Review

Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the TPG-0850D-R's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Test12V5V3.3V5VSBPass/Fail
10% Load14.3mV3.7mV6.9mV4.4mVPass
20% Load27.9mV5.2mV7.5mV7.4mVPass
30% Load21.4mV4.6mV8.0mV6.2mVPass
40% Load22.0mV5.0mV9.8mV7.6mVPass
50% Load23.7mV5.5mV10.2mV8.9mVPass
60% Load22.8mV6.1mV11.8mV9.5mVPass
70% Load25.1mV7.0mV12.2mV10.7mVPass
80% Load26.2mV7.2mV13.3mV12.0mVPass
90% Load30.1mV9.6mV16.4mV16.5mVPass
100% Load52.1mV10.2mV19.3mV18.0mVPass
110% Load74.3mV11.1mV20.4mV20.1mVPass
Cross-Load 146.1mV7.8mV10.5mV6.1mVPass
Cross-Load 257.7mV8.7mV18.7mV15.7mVPass

Ripple suppression up to 90% load is excellent at +12V. However, under full load it increases significantly, exceeding 50mV. While that's not disturbingly high, it'd be ideal to see the result under 40mV.

On the other hand, the minor rails' ripple remains low, even during the overload test.

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

Ripple At 110-Percent Load

Ripple At Cross-Load 1

Ripple At Cross-Load 2

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12 comments
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  • powernod
    -It's not exactly a PSU-related question but more likely a general one.
    From the pictures from the monitoring software, i can notice that this software is able to measure CPU and GPU temperature. Do you have any idea if such monitoring is (relatively) accurate?
    -Excellent review Aris !!
  • Malik 722
    in corsair link software atleast both cpu and gpu temperatures are accurate.
  • Aris_Mp
    it takes readings from the system's (actually the individual components') sensors. If those are accurate then the software's readings will be accurate as well. Normally they are accurate.
  • Nuckles_56
    That 12V transient response was certainly interesting, I don't think I've seen one do anything like that before
  • turkey3_scratch
    1670073 said:
    That 12V transient response was certainly interesting, I don't think I've seen one do anything like that before


    Do what?
  • Nuckles_56
    1712875 said:
    1670073 said:
    That 12V transient response was certainly interesting, I don't think I've seen one do anything like that before
    Do what?


    Go and plummet back down to almost 0V during the test
  • turkey3_scratch
    1670073 said:
    1712875 said:
    1670073 said:
    That 12V transient response was certainly interesting, I don't think I've seen one do anything like that before
    Do what?
    Go and plummet back down to almost 0V during the test


    I don't think you're reading the transient response graph properly. It's not a measure of voltage but a measure of ripple (well, technically that is a measure of voltage but it's more a measure of instantaneous offsets of an average, or a highly zoomed in sector).

    That or I am just missing something. I probably am. Not sure what I'm missing though. Forgive my ignorance.
  • Aris_Mp
    yes this is something really weird indeed.
  • sparkyman215
    Fantastic review Aris! I absolutely love reading in depth articles about anything. Terrible PSU for the price, but it's an awesome review. Congrats!
  • turkey3_scratch
    1670073 said:


    Oh you mean turn-on transient not transient response ;)
  • Nuckles_56
    1712875 said:
    1670073 said:
    Oh you mean turn-on transient not transient response ;)


    Oops, my bad :lol: