Thermaltake Toughpower DPS G RGB 850W PSU Review

Efficiency, Temperature, And Noise

Efficiency

Our efficiency testing procedure is detailed here.

Using the results from the previous page, we plotted a chart showing the TPG-0850D-R's efficiency at low loads, and loads from 10 to 110 percent of its maximum-rated capacity.

The TPG-0850D-R only appears in second-to-last place with normal loads. Under light loads, its performance is significantly better. We can point our finger at the CSH LED platform's efficiency, given the competition Thermaltake faces in this price range. 

Efficiency At Low Loads

In the following tests, we measure the TPG-0850D-R's efficiency at loads significantly lower than 10 percent of its maximum capacity (the lowest load the 80 PLUS standard measures). The loads we dialed were 20, 40, 60 and 80W. This is important for representing when a PC is idle with power-saving features turned on.

Test #12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed
Fan Noise
PF/AC Volts
11.202A0.491A0.476A0.195A19.6569.19%0 RPM
0 dB(A)
0.866
12.133V5.064V3.348V5.059V28.40115.1V
22.430A0.979A0.985A0.396A39.7179.12%0 RPM0 dB(A)0.932
12.127V5.058V3.343V5.047V50.19115.1V
33.665A1.476A1.496A5.036A59.8785.20%0 RPM0 dB(A)0.964
12.122V5.050V3.338V5.036V70.27115.1V
44.887A1.984A1.978A0.795A79.8086.41%0 RPM0 dB(A)0.973
12.115V5.043V3.334V5.025V92.35115.1V

Efficiency isn't as high as we'd expect from an expensive Gold-rated unit under light loads. With 20W, we don't want to see below 70% readings, while at 40W it'd be nice to see measurements above 80%.

DPSApp Screenshots

You'll find screenshots of the DPSApp software below, which we took under light loads.

Efficiency readings are way off, while the wattage numbers are close to correct for once.

5VSB Efficiency

The ATX specification states that 5VSB standby supply efficiency should be as high as possible, recommending 50 percent or higher efficiency with 100mA of load, 60 percent or higher with 250mA of load, and 70 percent or higher with 1A or more of load.

We take four measurements: one each at 100, 250 and 1000mA, and one with the full load the 5VSB rail can handle. 

Test #5VSBDC/AC (Watts)EfficiencyPF/AC Volts
10.101A0.5177.27%0.064
5.023V0.66115.1V
20.251A1.2680.26%0.142
5.018V1.57115.1V
31.002A5.0081.30%0.324
4.995V6.15115.1V
43.002A14.8078.60%0.434
4.931V18.83115.1V

Contrary to the unit's overall average efficiency, the 5VSB circuit fares better.

Power Consumption In Idle And Standby

In the table below, you'll find the power consumption and voltage values of all rails (except -12V) when the PSU is idle (powered on, but without any load on its rails), and the power consumption when the PSU is in standby mode (without any load, at 5VSB).

Mode12V5V3.3V5VSBWattsPF/AC Volts
Idle12.138V5.075V3.354V5.074V8.750.535
115.1V
Standby0.040.004
115.1V

Limited vampire power is to thank for the increased efficiency at 5VSB, especially under light loads.

Fan RPM, Delta Temperature, And Output Noise

Our mixed noise testing is described in detail here.

The first chart below illustrates the cooling fan's speed (in RPM), and the delta between input and output temperature. The results were obtained at 37°C (98.6°F) to 48°C (118.4°F) ambient temperature.   

The next chart shows the cooling fan's speed (again, in RPM) and output noise. We measured acoustics from one meter away, inside a small, custom-made anechoic chamber with internals completely covered in sound-proofing material (be quiet! Noise Absorber kit). Background noise inside the chamber was below 18 dB(A) during testing, and the results were obtained with the PSU operating at 37°C (98.6°F) to 48°C (118.4°F) ambient temperature. 

The following graphs illustrate the fan's output noise and speed over the PSU's operating range. The same conditions of the above graph apply to our measurements, though the ambient temperature was between at 28°C (82.4°F) to 30°C (86°F).  

The PSU's fan is dead silent with 500 to 550W loads. It starts to spin at higher loads, but remains quiet until the load hits 800W. In general, this is a very quiet PSU that will satisfy enthusiasts who dislike noisy components.

As you can see from the graph above, the fan's speed doesn't exceed 1200 RPM, even in the worst-case scenario. Up to 650W load, the fan stays below 800 RPM.

This thread is closed for comments
12 comments
    Your comment
  • 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: