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Thermaltake Toughpower GF2 ARGB 850W Power Supply Review

Toughpower with tons of RGB lighting.

Thermaltake Toughpower GF2 ARGB 850W
(Image: © Tom's Hardware)

To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units. 

Primary Rails And 5VSB Load Regulation

The following charts show the main rails' voltage values recorded between a range of 40W up to the PSU's maximum specified load, along with the deviation (in percent). Tight regulation is an important consideration every time we review a power supply because it facilitates constant voltage levels despite varying loads. Tight load regulation also, among other factors, improves the system’s stability, especially under overclocked conditions and, at the same time, it applies less stress to the DC-DC converters that many system components utilize.

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Results 1-8: Load Regulation

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Load regulation is tight at 12V and 5V, satisfactory at 3.3V, and loose at 5VSB. 

Hold-Up Time

Put simply; hold-up time is the amount of time that the system can continue to run without shutting down or rebooting during a power interruption.

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Results 9-12: Hold-Up Time

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

The hold-up time is long and the power ok signal is accurate. 

Inrush Current

Inrush current, or switch-on surge, refers to the maximum, instantaneous input current drawn by an electrical device when it is first turned on. A large enough inrush current can cause circuit breakers and fuses to trip. It can also damage switches, relays, and bridge rectifiers. As a result, the lower the inrush current of a PSU right as it is turned on, the better.

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Results 13-14: Inrush Current

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Despite the lack of an NTC thermistor, the inrush current is low. 

Leakage Current

In layman's terms, leakage current is the unwanted transfer of energy from one circuit to another. In power supplies, it is the current flowing from the primary side to the ground or the chassis, which in the majority of cases is connected to the ground. For measuring leakage current, we use a GW Instek GPT-9904 electrical safety tester instrument.

The leakage current test is conducted at 110% of the DUT's rated voltage input (so for a 230-240V device, we should conduct the test with 253-264V input). The maximum acceptable limit of a leakage current is 3.5 mA and it is defined by the IEC-60950-1 regulation, ensuring that the current is low and will not harm any person coming in contact with the power supply's chassis.

Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Leakage Current Comments

10-110% Load Tests

These tests reveal the PSU's load regulation and efficiency levels under high ambient temperatures. They also show how the fan speed profile behaves under increased operating temperatures.

Test #12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed (RPM)PSU Noise (dB[A])Temps (In/Out)PF/AC Volts
15.269A1.984A1.966A0.991A84.96386.569%0<6.043.85°C0.970
12.026V5.040V3.354V5.049V98.14540.41°C115.11V
211.578A2.979A2.955A1.193A170.04290.463%60313.440.48°C0.987
12.018V5.035V3.350V5.029V187.96944.30°C115.11V
318.224A3.480A3.453A1.397A255.05791.733%60613.641.16°C0.997
12.017V5.030V3.346V5.011V278.04445.62°C115.10V
424.884A3.979A3.948A1.603A340.08891.556%60813.641.99°C0.996
12.011V5.028V3.343V4.992V371.45447.24°C115.10V
531.202A4.977A4.942A1.811A425.02791.040%61013.842.31°C0.997
12.003V5.024V3.339V4.972V466.85848.16°C115.10V
637.489A5.977A5.939A2.000A509.47090.375%87725.042.75°C0.998
11.997V5.020V3.335V4.952V563.72749.30°C115.09V
743.856A6.980A6.935A2.232A594.91589.598%107932.143.56°C0.998
11.989V5.016V3.332V4.931V663.97950.82°C115.09V
850.231A7.985A7.934A2.445A680.24888.764%120135.443.96°C0.998
11.981V5.012V3.328V4.910V766.35752.05°C115.09V
957.006A8.488A8.424A2.451A765.17987.934%149641.044.84°C0.998
11.975V5.009V3.325V4.898V870.17053.71°C115.08V
1063.530A8.995A8.944A3.088A849.99186.925%149840.945.17°C0.999
11.967V5.005V3.321V4.859V977.84054.72°C115.07V
1170.651A8.997A8.951A3.095A934.77285.807%149840.946.69°C0.999
11.961V5.003V3.318V4.848V1089.39257.44°C115.06V
CL10.122A14.004A14.000A0.000A118.59681.726%61714.541.88°C0.980
12.018V5.022V3.343V5.064V145.11448.25°C115.13V
CL270.843A0.999A1.000A1.000A861.65187.494%149641.045.60°C0.999
11.975V5.021V3.331V4.959V984.80955.04°C115.07V

The PSU doesn't have a problem delivering full power, or even more, under high operating temperatures. Moreover, it delivers high PF readings even under low loads. 

20-80W Load Tests

In the following tests, we measure the PSU's efficiency at loads significantly lower than 10% of its maximum capacity (the lowest load the 80 PLUS standard measures). This is important for representing when a PC is idle with power-saving features turned on.

Test #12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed (RPM)PSU Noise (dB[A])PF/AC Volts
11.240A0.500A0.501A0.200A20.15058.903%0<6.00.892
12.039V5.044V3.358V5.090V34.209115.12V
22.467A0.991A0.984A0.394A39.98180.087%0<6.00.931
12.031V5.042V3.357V5.079V49.922115.11V
33.705A1.488A1.473A0.592A60.01184.523%0<6.00.959
12.029V5.041V3.355V5.068V71.000115.11V
44.936A1.984A1.969A0.791A79.96286.302%0<6.00.966
12.026V5.039V3.354V5.057V92.654115.11V

Efficiency with 20W load is low, very low. With higher loads, efficiency exceeds the 80% mark. 

2% or 10W Load Test

Intel plans on raising the ante at efficiency levels under ultra-light loads. So from July 2020, the ATX spec will require 70% and higher efficiency with 115V input. The applied load is only 10W for PSUs with 500W and lower capacities, while for stronger units we dial 2% of their max-rated-capacity.

Test #12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed (RPM)PSU Noise (dB[A])PF/AC Volts
11.224A0.250A0.251A0.052A17.10356.515%0<6.00.870
12.037V5.043V3.358V5.096V30.263115.12V

As expected, the PSU doesn't deliver high efficiency with super-light loads. 

Efficiency & Power Factor

Next, we plotted a chart showing the PSU’s efficiency at low loads, and loads from 10 to 110% of its maximum rated capacity. The higher a PSU’s efficiency, the less energy goes wasted, leading to a reduced carbon footprint and lower electricity bills. The same goes for Power Factor.

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Results 15-18: Efficiency

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Thermaltake Toughpower GF2 ARGB 850W

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Efficiency is high with normal loads but bottom low at light and super-light loads. On the other hand, PF readings are high with both 115V and 230V input. 

5VSB Efficiency

Test #5VSBDC/AC (Watts)EfficiencyPF/AC Volts
10.100A0.51074.561%0.092
5.095V0.684115.11V
20.250A1.27377.527%0.168
5.089V1.642115.11V
30.550A2.79378.588%0.256
5.077V3.554115.11V
41.000A5.06078.927%0.307
5.060V6.411115.11V
51.500A7.56178.834%0.337
5.040V9.591115.12V
63.000A14.94177.435%0.376
4.980V19.295115.12V
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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Results 19-20: 5VSB Efficiency

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

The 5VSB rail is efficient. 

Power Consumption In Idle And Standby

Mode12V5V3.3V5VSBWattsPF/AC Volts
Idle12.039V5.042V3.357V5.100V4.6060.388
115.1V
Standby0.0700.009
115.1V
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Thermaltake Toughpower GF2 ARGB 850W

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Results 21-22: Vampire Power

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Vampire power could be lower, with 230V input. 

Fan RPM, Delta Temperature, And Output Noise

All results are obtained between an ambient temperature of 37 to 47 degrees Celsius (98.6 to 116.6 degrees Fahrenheit).

(Image credit: Tom's Hardware)

(Image credit: Tom's Hardware)

The fan speed profile could have more steps, especially at lower loads. This would offer a more linear fan speed increase. 

The following results were obtained at 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit) ambient temperature.       

(Image credit: Tom's Hardware)

(Image credit: Tom's Hardware)

The PSU's passive operation doesn't last long, but at least the output noise remains low at up to 450W load. With higher than 650W loads, the fan's noise exceeds 35 dBA, and after 720W, you will be treated with over 40 dBA. This means that the fan speed profile could be more relaxed under normal operating temperatures. 

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