FSP Dagger Pro 650 W Review 6

FSP Dagger Pro 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 PSU characteristic since it allows for constant voltage levels even with 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. 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.







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. 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 Testing

These tests reveal the SDA2-650'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 SDA2-650
Test12 V5 V3.3 V5VSBPower
(DC/AC)
EfficiencyFan SpeedPSU NoiseTemp
(In/Out)
PF/AC
Volts
10% Load3.582A1.989A1.996A0.985A64.935W84.044%1643 RPM24.8 dB(A)40.45°C0.877
12.095V5.031V3.306V5.080V77.263W43.58°C230.35V
20% Load8.149A2.984A2.996A1.185A129.462W89.285%1649 RPM24.8 dB(A)40.62°C0.950
12.094V5.029V3.305V5.063V144.998W44.34°C230.35V
30% Load13.114A3.482A3.481A1.387A194.568W91.078%1744 RPM27.1 dB(A)41.34°C0.972
12.091V5.027V3.304V5.048V213.629W45.66°C230.36V
40% Load18.087A3.983A3.997A1.590A259.812W91.577%2307 RPM35.1 dB(A)41.52°C0.982
12.086V5.024V3.303V5.032V283.708W46.49°C230.36V
50% Load22.729A4.981A5.000A1.795A325.102W91.580%2742 RPM40.9 dB(A)42.16°C0.988
12.081V5.021V3.300V5.016V354.993W47.66°C230.36V
60% Load27.315A5.983A6.007A2.001A389.620W91.040%3416 RPM47.1 dB(A)42.80°C0.991
12.074V5.016V3.297V4.999V427.966W48.79°C230.36V
70% Load31.972A6.988A7.012A2.209A454.949W90.723%3505 RPM48.6 dB(A)43.09°C0.993
12.068V5.010V3.294V4.981V501.470W49.71°C230.37V
80% Load36.637A7.995A8.022A2.418A520.249W90.271%3493 RPM48.6 dB(A)43.68°C0.994
12.060V5.004V3.291V4.963V576.319W50.92°C230.37V
90% Load41.691A8.503A8.511A2.423A585.177W89.836%3492 RPM48.6 dB(A)44.10°C0.996
12.057V5.000V3.289V4.953V651.387W51.80°C230.37V
100% Load46.708A9.010A9.037A2.531A649.910W89.248%3490 RPM48.5 dB(A)45.69°C0.997
12.047V4.996V3.287V4.939V728.204W54.02°C230.37V
110% Load52.139A9.018A9.039A2.537A714.727W88.606%3489 RPM48.5 dB(A)46.56°C0.997
12.035V4.993V3.286V4.929V806.636W55.42°C230.37V
Crossload 10.153A14.002A14.000A0.000A117.317W83.143%3156 RPM44.5 dB(A)42.68°C0.948
12.092V4.987V3.260V5.082V141.103W48.35°C230.36V
Crossload 254.018A1.004A1.000A1.000A664.212W89.805%3492 RPM48.6 dB(A)45.25°C0.997
12.049V5.018V3.305V5.006V739.614W53.74°C230.36V

Light Load Testing

In the following tests, we measure the SDA2-650's efficiency at loads significantly lower than 10 percent of its maximum capacity (the lowest load the 80 PLUS standard measures). This is important for when a PC is idle with its power-saving features turned on.

Efficiency at Low Loads - FSP SDA2-650
Test #12 V5 V3.3 V5 VSBPower
(DC/AC)
EfficiencyFan SpeedPSU NoisePF/AC
Volts
12.848A0.496A0.482A0.196A39.583W81.559%0 RPM<6.0 dB(A)0.690
12.109V5.037V3.310V5.112V48.533W230.32V
24.106A0.993A0.995A0.392A59.985W84.682%1644 RPM24.8 dB(A)0.864
12.102V5.037V3.310V5.102V70.836W230.32V
35.298A1.491A1.480A0.589A79.479W86.925%1645 RPM24.8 dB(A)0.903
12.095V5.034V3.307V5.092V91.434W230.32V
46.555A1.989A1.994A0.787A99.875W88.296%1648 RPM24.8 dB(A)0.929
12.094V5.031V3.306V5.082V113.114W230.32V

Efficiency

Using the results that we gathered so far, we plotted a chart showing the SDA2-650's efficiency at low loads and loads ranging from 10 to 110 percent of its maximum-rated capacity.


Efficiency with light loads is high enough. With normal loads, the unit falls behind the competition, though. As you can see in the graph above, FSP's other platform, used in the EVGA 650 GM, performs much better.

5VSB Efficiency

5VSB Efficiency - FSP SDA2-650
Test #5VSBPower (DC/AC)EfficiencyPF/AC Volts
10.100A0.512W59.953%0.044
5.122V0.854W230.33V
20.250A1.280W69.414%0.091
5.117V1.844W230.33V
30.550A2.809W71.952%0.173
5.106V3.904W230.33V
41.000A5.091W71.473%0.257
5.090V7.123W230.33V
51.500A7.613W72.810%0.309
5.074V10.456W230.33V
62.500A12.602W72.404%0.366
5.040V17.405W230.41V

The 5VSB regulator needs upgrades for improved efficiency. FSP has highly efficient 5VSB regulator circuits, which has me wonder why its engineers used this one.

Power Consumption in Idle and Standby

Idle / Standby - FSP SDA2-650
Mode12 V5 V3.3 V5VSBPower (AC)PF/AC Volts
Idle12.111V5.039V3.311V5.124V7.858W0.254
230.4V
Standby0.206W0.010
230.4V

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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