Efficiency diagram
Based on the results collected so far, we now have a diagram that shows the efficiency of the power supply quite well at low loads and at loads between 10 and 110 percent of the maximum rated power. The result is good, but unfortunately not very good. I’m sure there’s room for a little improvement.
Load test between 10% and 110
These tests provide information on the load regulation and efficiency of the power supply at high ambient temperatures and show how the fan speed profile behaves under harsh operating conditions. The PSU copes well with high operating temperatures at full load and the fan speed profile is still very relaxed up to the 60% load test. Only during the full load and overload tests, where the ambient temperature was above 45 °C, did the fan start spinning at its maximum speed.
Test | 12 V | 5 V | 3.3 V | 5VSB | Power (DC/AC) |
Efficiency | Fan Speed | PSU Noise | Temp (In/Out) |
PF/AC Volts |
---|---|---|---|---|---|---|---|---|---|---|
10% Load | 5.257A | 1.988A | 2.010A | 0.997A | 84.958W | 88.219% | 0 RPM | <6.0 dB(A) | 46.35°C | 0.868 |
12.051V | 5.031V | 3.284V | 5.018V | 96.303W | 40.33°C | 230.35V | ||||
20% Load | 11.554A | 2.985A | 3.019A | 1.197A | 170.031W | 91.887% | 0 RPM | <6.0 dB(A) | 47.57°C | 0.949 |
12.041V | 5.027V | 3.281V | 5.012V | 185.044W | 40.86°C | 230.34V | ||||
30% Load | 18.228A | 3.484A | 3.519A | 1.398A | 255.037W | 92.895% | 0 RPM | <6.0 dB(A) | 48.31°C | 0.971 |
12.014V | 5.024V | 3.280V | 5.007V | 274.544W | 41.15°C | 230.34V | ||||
40% Load | 24.897A | 3.984A | 4.026A | 1.600A | 340.046W | 92.794% | 0 RPM | <6.0 dB(A) | 49.51°C | 0.980 |
12.003V | 5.021V | 3.279V | 5.001V | 366.454W | 41.66°C | 230.34V | ||||
50% Load | 31.227A | 4.984A | 5.035A | 1.801A | 424.963W | 92.458% | 413 RPM | 8.4 dB(A) | 42.58°C | 0.984 |
11.991V | 5.019V | 3.278V | 4.997V | 459.626W | 51.22°C | 230.34V | ||||
60% Load | 37.547A | 5.983A | 6.047A | 2.000A | 509.502W | 92.028% | 597 RPM | 15.3 dB(A) | 42.92°C | 0.987 |
11.977V | 5.016V | 3.275V | 4.993V | 553.636W | 52.40°C | 230.34V | ||||
70% Load | 43.935A | 6.984A | 7.058A | 2.205A | 594.838W | 91.485% | 842 RPM | 26.2 dB(A) | 43.23°C | 0.989 |
11.966V | 5.013V | 3.273V | 4.989V | 650.204W | 53.57°C | 230.34V | ||||
80% Load | 50.328A | 7.988A | 8.067A | 2.408A | 680.181W | 90.892% | 1070 RPM | 33.3 dB(A) | 43.42°C | 0.990 |
11.957V | 5.009V | 3.272V | 4.984V | 748.336W | 54.28°C | 230.33V | ||||
90% Load | 57.131A | 8.492A | 8.562A | 2.409A | 765.103W | 90.307% | 1334 RPM | 39.4 dB(A) | 44.88°C | 0.991 |
11.948V | 5.005V | 3.270V | 4.982V | 847.224W | 56.11°C | 230.32V | ||||
100% Load | 63.679A | 8.996A | 9.087A | 3.020A | 849.907W | 89.499% | 1914 RPM | 48.1 dB(A) | 45.96°C | 0.991 |
11.938V | 5.003V | 3.268V | 4.968V | 949.626W | 58.12°C | 230.33V | ||||
110% Load | 70.838A | 9.001A | 9.094A | 3.022A | 934.727W | 88.877% | 1902 RPM | 48.5 dB(A) | 46.64°C | 0.992 |
11.929V | 4.999V | 3.266V | 4.965V | 1051.706W | 60.47°C | 230.33V | ||||
Crossload 1 | 0.117A | 17.998A | 17.998A | 0.000A | 150.485W | 83.577% | 586 RPM | 14.8 dB(A) | 42.78°C | 0.947 |
12.028V | 5.007V | 3.276V | 5.059V | 180.055W | 51.22°C | 230.36V | ||||
Crossload 2 | 70.832A | 1.000A | 1.000A | 1.000A | 859.565W | 90.058% | 1904 RPM | 48.6 dB(A) | 45.53°C | 0.991 |
11.948V | 5.005V | 3.268V | 4.992V | 954.460W | 58.03°C | 230.33V |
Tests at low load
In the following tests, we measure the efficiency of the power supply at loads well below 10 percent of maximum capacity (the lowest load measured by the 80 PLUS standard). This is important when a PC is idle with power saving features turned on. The result is very good.
Test # | 12 V | 5 V | 3.3 V | 5 CDB | Power (DC/AC) |
Efficiency | Fan Speed | PSU Noise | PF/AC Volts |
1 | 2.908A | 0.495A | 0.499A | 0.198A | 40.027W | 85.186% | 0 RPM | <6.0 dB(A) | 0.679 |
---|---|---|---|---|---|---|---|---|---|
11.993V | 5.059V | 3.297V | 5.058V | 46.988W | 230.34V | ||||
2 | 4.140A | 0.994A | 1.003A | 0.397A | 59.977W | 87.620% | 0 RPM | <6.0 dB(A) | 0.792 |
11.999V | 5.037V | 3.286V | 5.034V | 68.451W | 230.34V | ||||
3 | 5.359A | 1.490A | 1.507A | 0.597A | 80.015W | 87.776% | 0 RPM | <6.0 dB(A) | 0.858 |
12.048V | 5.034V | 3.284V | 5.027V | 91.158W | 230.34V | ||||
4 | 6.594A | 1.988A | 2.009A | 0.797A | 100.050W | 89.350% | 0 RPM | <6.0 dB(A) | 0.893 |
12.049V | 5.031V | 3.283V | 5.021V | 111.975W | 230.35V |
Tests at extremely low load
The applied load in this test is only 10 W for power supplies of 500 W or less. For all other power supplies, we select 2% of the maximum rated power and perform this test with 115 V input voltage only. Intel claims over 70% efficiency at 2% load and the RM850x even exceeds 77%. This is a real top performance!
Test # | 12 V | 5 V | 3.3 V | 5 CDB | Power (DC/AC) |
Efficiency | Fan Speed | PSU Noise | PF/AC Volts |
1 | 1.184A | 0.302A | 0.303A | 0.050A | 16.977W | 77.344% | 0 RPM | <6.0 dB(A) | 0.815 |
---|---|---|---|---|---|---|---|---|---|
11.991V | 5.058V | 3.296V | 5.059V | 21.950W | 115.15V |
5VSB Efficiency
Test # | 5VSB | Power (DC/AC) | Efficiency | PF/AC Volts |
---|---|---|---|---|
1 | 0.100A | 0.505W | 70.531% | 0.022 |
5.045V | 0.716W | 230.38V | ||
2 | 0.250A | 1.261W | 74.926% | 0.051 |
5.042V | 1.683W | 230.38V | ||
3 | 0.550A | 2.771W | 76.759% | 0.105 |
5.037V | 3.610W | 230.38V | ||
4 | 1.000A | 5.028W | 77.917% | 0.171 |
5.027V | 6.453W | 230.38V | ||
5 | 1.500A | 7.527W | 78.138% | 0.228 |
5.017V | 9.633W | 230.33V | ||
6 | 3.000A | 14.959W | 78.274% | 0.325 |
4.986V | 19.111W | 230.33V |
Power consumption in idle and standby
Fashion | 12 V | 5 V | 3.3 V | 5VSB | Power (AC) | PF/AC Volts |
Idle | 11.989V | 5.059V | 3.296V | 5.060V | 1.834W | 0.057 |
---|---|---|---|---|---|---|
230.3V | ||||||
Standby | 0.055W | 0.001 | ||||
230.3V |
- 1 - Unboxing, Vorstellung und technische Daten
- 2 - Anschluss-Kabel und Kabel-Management
- 3 - Innerer Aufbau und Komponenten
- 4 - Spannungsregulation und Restwelligkeit (Ripple)
- 5 - Effizienz
- 6 - Geräuschemission und Lüfterdrehzahlen
- 7 - Crossload im Detail
- 8 - Timing Tests
- 9 - Erweiterte Transienten-Tests
- 10 - Schutzfunktionen, Power Sequencing, EMV
- 11 - Zusammenfassung und Fazit
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