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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)

Advanced Transient Response Tests

For details about our transient response testing, please click here.

In the real world, power supplies are always working with loads that change. It's of immense importance, then, for the PSU to keep its rails within the ATX specification's defined ranges. The smaller the deviations, the more stable your PC will be with less stress applied to its components. 

We should note that the ATX spec requires capacitive loading during the transient rests, but in our methodology, we also choose to apply a worst case scenario with no additional capacitance on the rails. 

Advanced Transient Response at 20% – 20ms

VoltageBeforeAfterChangePass/Fail
12V12.016V11.698V2.65%Pass
5V5.035V4.904V2.60%Pass
3.3V3.350V3.183V4.99%Pass
5VSB5.028V4.968V1.19%Pass

Advanced Transient Response at 20% – 10ms

VoltageBeforeAfterChangePass/Fail
12V12.013V11.774V1.99%Pass
5V5.033V4.904V2.56%Pass
3.3V3.349V3.194V4.63%Pass
5VSB5.028V4.961V1.33%Pass

Advanced Transient Response at 20% – 1ms

VoltageBeforeAfterChangePass/Fail
12V12.013V11.696V2.64%Pass
5V5.032V4.903V2.56%Pass
3.3V3.349V3.181V5.02%Pass
5VSB5.028V4.966V1.23%Pass

Advanced Transient Response at 50% – 20ms

VoltageBeforeAfterChangePass/Fail
12V11.999V11.845V1.28%Pass
5V5.022V4.890V2.63%Pass
3.3V3.338V3.162V5.27%Pass
5VSB4.973V4.883V1.81%Pass

Advanced Transient Response at 50% – 10ms

VoltageBeforeAfterChangePass/Fail
12V12.000V11.841V1.33%Pass
5V5.023V4.890V2.65%Pass
3.3V3.339V3.168V5.12%Pass
5VSB4.973V4.899V1.49%Pass

Advanced Transient Response at 50% – 1ms

VoltageBeforeAfterChangePass/Fail
12V12.000V11.856V1.20%Pass
5V5.022V4.878V2.87%Pass
3.3V3.338V3.166V5.15%Pass
5VSB4.973V4.887V1.73%Pass
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Thermaltake GF2 850W

(Image credit: Tom's Hardware)

Results 25-29: Transient Response

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Thermaltake GF2 850W

(Image credit: Tom's Hardware)
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Thermaltake GF2 850W

(Image credit: Tom's Hardware)
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Thermaltake GF2 850W

(Image credit: Tom's Hardware)
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Thermaltake GF2 850W

(Image credit: Tom's Hardware)
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Thermaltake GF2 850W

(Image credit: Tom's Hardware)
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Thermaltake GF2 850W

(Image credit: Tom's Hardware)
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Thermaltake GF2 850W

(Image credit: Tom's Hardware)

Transient response is mediocre on all rails, especially at 12V and 3.3V. 

Turn-On Transient Tests

In the next set of tests, we measure the PSU's response in simpler transient load scenarios—during its power-on phase. Ideally, we don't want to see any voltage overshoots or spikes since those put a lot of stress on the DC-DC converters of installed components.

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Thermaltake GF2 850W

(Image credit: Tom's Hardware)

Turn-On Transient Response Scope Shots

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Thermaltake GF2 850W

(Image credit: Tom's Hardware)
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Thermaltake GF2 850W

(Image credit: Tom's Hardware)

Very good results in the turn-on transient tests. 

Power Supply Timing Tests

There are several signals generated by the power supply, which need to be within specified, by the ATX spec, ranges. If they are not, there can be compatibility issues with other system parts, especially mainboards. From year 2020, the PSU's Power-on time (T1) has to be lower than 150ms and the PWR_OK delay (T3) from 100 to 150ms, to be compatible with the Alternative Sleep Mode.

PSU Timings Table
T1 (Power-on time) & T3 (PWR_OK delay)
LoadT1T3
20%38ms130ms
100%38ms128ms

The PWR_OK delay is within the 100-150ms region, so the PSU supports the alternative sleep mode recommended by the ATX spec.

Ripple Measurements

Ripple represents the AC fluctuations (periodic) and noise (random) found in the PSU's DC rails. This phenomenon significantly decreases the capacitors' lifespan because it causes them to run hotter. A 10-degree Celsius increase can cut into a cap's useful life by 50%. Ripple also plays an important role in overall system stability, especially when overclocking is involved.

The ripple limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Test12V5V3.3V5VSBPass/Fail
10% Load32.0 mV7.6 mV10.7 mV3.5 mVPass
20% Load11.9 mV10.7 mV24.6 mV7.9 mVPass
30% Load9.2 mV8.5 mV11.8 mV3.9 mVPass
40% Load9.0 mV9.5 mV12.4 mV4.1 mVPass
50% Load9.5 mV10.4 mV12.5 mV4.8 mVPass
60% Load9.9 mV11.0 mV12.2 mV4.6 mVPass
70% Load11.4 mV11.6 mV13.1 mV5.1 mVPass
80% Load12.4 mV12.4 mV16.0 mV5.8 mVPass
90% Load13.9 mV13.3 mV14.6 mV6.2 mVPass
100% Load16.7 mV15.0 mV16.1 mV7.3 mVPass
110% Load19.9 mV16.7 mV18.5 mV7.5 mVPass
Crossload 125.5 mV17.0 mV19.2 mV14.7 mVPass
Crossload 216.8 mV13.6 mV14.3 mV6.5 mVPass
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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Results 30-33: Ripple Suppression

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Thermaltake Toughpower GF2 ARGB 850W

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

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

(Image credit: Tom's Hardware)

Ripple suppression is good on all rails. 

Ripple At Full Load

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Ripple Full Load Scope Shots

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Thermaltake Toughpower GF2 ARGB 850W

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

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

(Image credit: Tom's Hardware)

Ripple At 110% Load

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Ripple 110% Load Scope Shots

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Thermaltake Toughpower GF2 ARGB 850W

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

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

(Image credit: Tom's Hardware)

Ripple At Cross-Load 1

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Ripple CL1 Load Scope Shots

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Thermaltake Toughpower GF2 ARGB 850W

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

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

(Image credit: Tom's Hardware)

Ripple At Cross-Load 2

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Thermaltake Toughpower GF2 ARGB 850W

(Image credit: Tom's Hardware)

Ripple CL2 Load Scope Shots

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Thermaltake Toughpower GF2 ARGB 850W

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

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

(Image credit: Tom's Hardware)

EMC Pre-Compliance Testing – Average & Peak EMI Detector Results

Electromagnetic Compatibility (EMC) is the ability of a device to operate properly in its environment without disrupting the proper operation of other nearby devices.

Electromagnetic Interference (EMI) stands for the electromagnetic energy a device emits, and it can cause problems in other nearby devices if too high. For example, it can be the cause of increased static noise in your headphones or/and speakers.

(Image credit: Tom's Hardware)

Conducted EMI emissions could be lower. With the average EMI detector, we found nine peaks over the limits and only two with the peak detector, so there is a possibility with the quasi-peak detector the PSU to meet the CISPR 32/EN 55032 requirements. Still, it doesn't meet the AVG EMI detector's requirements. 

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