Thermaltake Toughpower PF1 ARGB 1200W Power Supply Review: RGB Power

The Toughpower PF1 ARGB 1200W is powerful​, achieves high performance and has RGB lighting.

(Image: © Future)

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Transient Response Tests, Timing Tests, Ripple Measurements and EMC Pre-Compliance Testing

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% – 200ms

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VoltageBeforeAfterChangePass/Fail
12V12.003V11.926V0.64%Pass
5V5.081V5.017V1.26%Pass
3.3V3.293V3.190V3.13%Pass
5VSB5.067V5.016V1.01%Pass

Advanced Transient Response at 20% – 20ms

Swipe to scroll horizontally
VoltageBeforeAfterChangePass/Fail
12V11.998V11.890V0.90%Pass
5V5.081V5.007V1.46%Pass
3.3V3.293V3.171V3.70%Pass
5VSB5.067V5.014V1.05%Pass

Advanced Transient Response at 20% – 1ms

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VoltageBeforeAfterChangePass/Fail
12V12.000V11.907V0.78%Pass
5V5.081V5.004V1.52%Pass
3.3V3.293V3.164V3.92%Pass
5VSB5.067V5.013V1.07%Pass

Advanced Transient Response at 50% – 200ms

Swipe to scroll horizontally
VoltageBeforeAfterChangePass/Fail
12V11.993V11.915V0.65%Pass
5V5.070V5.002V1.34%Pass
3.3V3.285V3.175V3.35%Pass
5VSB5.050V5.001V0.97%Pass

Advanced Transient Response at 50% – 20ms

Swipe to scroll horizontally
VoltageBeforeAfterChangePass/Fail
12V11.996V11.894V0.85%Pass
5V5.070V4.987V1.64%Pass
3.3V3.285V3.155V3.96%Pass
5VSB5.050V4.998V1.03%Pass

Advanced Transient Response at 50% – 1ms

Swipe to scroll horizontally
VoltageBeforeAfterChangePass/Fail
12V12.001V11.903V0.82%Pass
5V5.069V4.984V1.68%Pass
3.3V3.285V3.152V4.05%Pass
5VSB5.049V4.989V1.19%Pass

The transient response is very good at +12V, which is the most important rail. In the rest rails, the deviations are also low, but the voltage levels at 3.3V drop lower than 3.2V once the transient load is applied, because of the low nominal (initial) voltage.

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.

The turn-on transient slopes are almost perfect. There is only a tiny spike at 5VSB, which cannot spoil of course the overall picture. 

Ripple Measurements

Ripple represent 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).

Swipe to scroll horizontally
Test12V5V3.3V5VSBPass/Fail
10% Load6.0 mV4.4 mV11.8 mV7.2 mVPass
20% Load7.8 mV4.8 mV12.6 mV7.6 mVPass
30% Load9.6 mV5.6 mV13.8 mV12.4 mVPass
40% Load9.8 mV6.8 mV15.6 mV9.2 mVPass
50% Load9.8 mV10.5 mV18.4 mV11.0 mVPass
60% Load11.0 mV8.3 mV17.7 mV10.3 mVPass
70% Load13.6 mV11.6 mV19.6 mV12.6 mVPass
80% Load15.5 mV19.4 mV26.0 mV18.5 mVPass
90% Load18.2 mV15.1 mV23.0 mV13.4 mVPass
100% Load23.3 mV13.6 mV25.0 mV14.7 mVPass
110% Load26.4 mV14.5 mV27.8 mV16.2 mVPass
Crossload 19.7 mV5.4 mV21.9 mV8.1 mVPass
Crossload 225.9 mV12.8 mV28.2 mV15.8 mVPass

The ripple suppression is satisfactory. It could be a little better, though, at 3.3V, but this rail isn't heavily used nowadays. 

Ripple At Full Load

Ripple At 110% Load

Ripple At Cross-Load 1

Ripple At Cross-Load 2

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 close-by devices.

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

(Image credit: Future)

The conducted EMI emissions are increased at low frequencies. Still, none of them exceeds the limits. 

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Aris Mpitziopoulos
Contributing Editor

Aris Mpitziopoulos is a contributing editor at Tom's Hardware, covering PSUs.