Primary Rails Load RegulationThe following charts show the voltage values of the main rails, recorded over a range from 60 W to the maximum specified load, and the deviation (in percent) for the same load range. Tight load regulation is an important characteristic for every power supply since it allows for constant voltage levels despite changes in load.
Hold-up TimeHold-up time represents the amount of time, usually measured in milliseconds, a PSU can maintain output regulations as defined by the ATX specification without input power. Hold-up time is the amount of time the system can continue to run without shutting down or rebooting during a power interruption. In the following screenshots, the blue line is the mains signal and the green line is the "Power Good" signal, while the yellow line represents the +12V rail.
Such an inaccurate power ok signal is a great shame in as expensive a power supply as this one.
Inrush CurrentInrush current, or switch-on surge, refers to the maximum instantaneous input current drawn by an electrical device when it is first turned on. Large enough inrush current can cause the tripping of circuit breakers and fuses and may 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.
10-110% Load TestingThese tests reveal the PSU's load regulation and efficiency levels at high ambient temperatures. They also show how the fan-speed profile behaves under tough operating conditions.
|Load Regulation & Efficiency Testing Data - Thermaltake TPD-1200F3FAPU-1|
|Test||12 V||5 V||3.3 V||5VSB||Power|
|Efficiency||Fan Speed||PSU Noise||Temp|
|10% Load||8.198A||1.966A||2.001A||0.986A||119.988W||88.733%||0 RPM||<6.0 dB(A)||47.75°C||0.821|
|20% Load||17.394A||2.953A||3.005A||1.184A||239.731W||92.399%||0 RPM||<6.0 dB(A)||48.83°C||0.912|
|30% Load||26.932A||3.447A||3.492A||1.384A||359.233W||93.372%||0 RPM||<6.0 dB(A)||49.72°C||0.944|
|40% Load||36.531A||3.941A||4.014A||1.583A||479.673W||93.543%||1588 RPM||42.1 dB(A)||41.98°C||0.961|
|50% Load||45.781A||4.932A||5.021A||1.783A||599.824W||93.728%||1284 RPM||35.1 dB(A)||42.31°C||0.970|
|60% Load||55.005A||5.922A||6.033A||1.983A||719.966W||93.300%||1603 RPM||41.5 dB(A)||42.76°C||0.978|
|70% Load||64.212A||6.917A||7.045A||2.184A||839.709W||93.016%||1611 RPM||41.5 dB(A)||43.46°C||0.981|
|80% Load||73.510A||7.912A||8.060A||2.386A||960.229W||92.741%||1616 RPM||41.5 dB(A)||44.05°C||0.988|
|90% Load||83.148A||8.412A||8.555A||2.387A||1079.530W||92.450%||1650 RPM||43.1 dB(A)||44.46°C||0.989|
|100% Load||92.657A||8.916A||9.084A||2.993A||1200.028W||92.044%||1625 RPM||41.8 dB(A)||45.63°C||0.990|
|110% Load||102.734A||8.923A||9.090A||2.994A||1320.057W||91.683%||1627 RPM||41.8 dB(A)||46.77°C||0.991|
|Crossload 1||0.148A||16.000A||15.999A||0.000A||135.371W||83.146%||1044 RPM||29.8 dB(A)||42.59°C||0.819|
|Crossload 2||100.037A||1.002A||1.000A||1.000A||1212.738W||92.385%||1627 RPM||41.8 dB(A)||45.25°C||0.990|
Load regulation is tight on all rails, and the PSU easily copes with increased operating temperatures. However, with such an aggressive fan-speed profile, it is a poor choice for users wanting to build a quiet system.
With 50% load, the fan speed profile goes crazy, with fan speed dropping instead of increasing. The MCU responsible for the fan control circuit apparently needs re-programming.
Light Load TestingWe measure the PSU's efficiency at loads significantly lower than 10 percent of its maximum capacity (the lowest load the 80 PLUS standard measures) in the following tests. This is important for when a PC is idle with its power-saving features turned on.
|Efficiency at Low Loads - Thermaltake TPD-1200F3FAPU-1|
|Test #||12 V||5 V||3.3 V||5 VSB||Power|
|Efficiency||Fan Speed||PSU Noise||PF/AC |
|1||2.868A||0.490A||0.483A||0.197A||39.576W||76.588%||0 RPM||<6.0 dB(A)||0.536|
|2||4.128A||0.982A||1.000A||0.393A||59.922W||82.093%||0 RPM||<6.0 dB(A)||0.673|
|3||5.330A||1.474A||1.485A||0.591A||79.420W||83.888%||0 RPM||<6.0 dB(A)||0.742|
|4||6.603A||1.965A||2.000A||0.788A||99.860W||87.130%||0 RPM||<6.0 dB(A)||0.787|
EfficiencyUsing the results we gathered so far, we plotted a chart showing the PSU's efficiency at low loads and loads from 10 to 110 percent of its maximum-rated capacity.
Efficiency at light loads falls behind the competition. That said, the PSU places second with normal loads.
|5VSB Efficiency - Thermaltake TPD-1200F3FAPU-1|
|Test #||5VSB||Power (DC/AC)||Efficiency||PF/AC Volts|
The 5VSB rail is not very efficient.
Power Consumption in Idle and Standby
|Idle / Standby - Thermaltake TPD-1200F3FAPU-1|
|Mode||12 V||5 V||3.3 V||5VSB||Power (AC)||PF/AC Volts|
Fan RPM, Delta Temperature and Output NoiseThe following results were obtained at 37–47 °C ambient.
The following results were obtained at 30–32 °C ambient.