FSP Hydro PTM 650 W Review 6

FSP Hydro PTM 650 W Review

Cross Load Tests »

Test Setup



Primary Rails Load Regulation

The 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.







5VSB Regulation



Hold-up Time

Hold-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. Put simply, hold-up time shows for how long a 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, the green line is the "Power Good" signal, and the yellow line represents the +12V rail.







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. High 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 Testing

These tests reveal the HPT650M's load regulation and efficiency levels under high ambient temperatures. They also show how the fan speed profile behaves under tough operating conditions.

Load Regulation & Efficiency Testing Data - FSP HPT650M
Test12 V5 V3.3 V5VSBPower
(DC/AC)
EfficiencyFan SpeedPSU NoiseTemp
(In/Out)
PF/AC
Volts
10% Load3.580A1.966A1.953A1.000A64.863W87.014%705 RPM17.0 dB(A)37.80°C0.884
12.086V5.087V3.375V5.003V74.543W40.87°C230.32V
20% Load8.153A2.956A2.941A1.201A129.358W91.433%703 RPM17.0 dB(A)38.92°C0.953
12.076V5.076V3.365V4.998V141.478W42.52°C230.32V
30% Load13.120A3.454A3.423A1.405A194.405W92.718%700 RPM16.9 dB(A)39.21°C0.976
12.074V5.067V3.357V4.983V209.673W43.22°C230.30V
40% Load18.114A3.955A3.943A1.611A259.630W93.236%700 RPM16.9 dB(A)40.28°C0.986
12.058V5.058V3.349V4.967V278.466W44.96°C230.29V
50% Load22.776A4.956A4.940A1.819A324.917W93.253%693 RPM16.8 dB(A)41.16°C0.990
12.048V5.047V3.339V4.950V348.427W46.21°C230.29V
60% Load27.389A5.958A5.946A2.029A389.461W93.055%700 RPM16.9 dB(A)42.05°C0.991
12.036V5.036V3.330V4.930V418.526W47.53°C230.28V
70% Load32.066A6.966A6.957A2.239A454.762W92.419%1373 RPM37.0 dB(A)43.66°C0.993
12.027V5.026V3.319V4.914V492.068W49.48°C230.28V
80% Load36.759A7.978A7.977A2.452A520.067W92.036%1410 RPM37.3 dB(A)43.44°C0.994
12.015V5.014V3.310V4.895V565.069W50.24°C230.28V
90% Load41.855A8.493A8.482A2.456A584.986W91.648%1412 RPM37.3 dB(A)44.19°C0.995
12.005V5.005V3.302V4.887V638.295W51.68°C230.28V
100% Load46.932A9.009A8.957A2.512A649.711W91.158%1470 RPM38.1 dB(A)44.43°C0.995
11.995V4.996V3.294V4.876V712.732W52.68°C230.28V
110% Load52.338A9.025A9.038A2.569A714.531W90.649%1650 RPM41.0 dB(A)46.60°C0.995
11.986V4.987V3.286V4.866V788.240W55.57°C230.27V
Crossload 10.140A14.001A14.000A0.000A119.139W87.040%1373 RPM37.0 dB(A)41.59°C0.951
12.055V5.050V3.339V5.010V136.878W46.76°C230.28V
Crossload 254.175A1.003A0.999A1.000A663.979W91.615%1445 RPM37.7 dB(A)44.36°C0.995
12.011V5.016V3.314V4.941V724.747W52.47°C230.27V

Light Load Testing

In the following tests, we measure the HPT650M's efficiency at loads significantly lower than 10 percent of its maximum capacity (the lowest load the 80 PLUS standard measures). This is representative of when a PC idles with its power-saving features turned on.

Efficiency at Low Loads - FSP HPT650M
Test #12 V5 V3.3 V5 VSBPower
(DC/AC)
EfficiencyFan SpeedPSU NoisePF/AC
Volts
12.842A0.489A0.472A0.198A39.465W82.983%700 RPM16.9 dB(A)0.799
12.097V5.095V3.381V5.043V47.558W230.27V
24.100A0.982A0.975A0.398A59.876W86.915%700 RPM16.9 dB(A)0.871
12.093V5.091V3.378V5.033V68.890W230.27V
35.293A1.473A1.449A0.598A79.376W89.028%703 RPM17.0 dB(A)0.908
12.090V5.088V3.374V5.016V89.158W230.27V
46.552A1.966A1.955A0.799A99.781W90.286%703 RPM17.0 dB(A)0.932
12.087V5.084V3.371V5.008V110.517W230.27V

Efficiency

Using the results we gathered so far, we plotted a chart showing the HPT650M's efficiency at low loads and loads from 10 to 110 percent of its maximum-rated capacity.


Efficiency is not impressive under light loads, but on par with the Platinum and ETA-A certified competition at higher loads.

5VSB Efficiency

5VSB Efficiency - FSP HPT650M
Test #5VSBPower (DC/AC)EfficiencyPF/AC Volts
10.100A0.506W70.769%0.036
5.058V0.715W230.28V
20.250A1.264W77.928%0.078
5.054V1.622W230.28V
30.550A2.773W80.822%0.152
5.041V3.431W230.28V
41.000A5.020W83.044%0.229
5.020V6.045W230.28V
51.500A7.512W84.046%0.284
5.008V8.938W230.28V
62.501A12.430W83.749%0.348
4.971V14.842W230.28V

The 5VSB rail is very efficient! Kudos to FSP for equipping this unit with a great 5VSB regulation circuit.

Power Consumption in Idle and Standby

Idle / Standby - FSP HPT650M
Mode12 V5 V3.3 V5VSBPower (AC)PF/AC Volts
Idle12.132V5.098V3.383V5.060V8.827W0.318
230.3V
Standby0.110W0.006
230.3V

Fan RPM, Delta Temperature and Output Noise

The following results were obtained at 37–47 °C ambient.





The following results were obtained at 30–32 °C ambient.

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