Load Regulation, Hold-Up Time & Inrush Current
To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units.
Primary Rails And 5VSB Load Regulation
Load Regulation testing is detailed here.
Our hold-up time tests are described in detail here.
The hold-up time we measured was very long. However, the power-good signal was inaccurate and looked strange in our oscilloscope pictures. There's normally a clean drop in the signal, but that wasn't the case for EVGA's SuperNOVA 650 G1+.
For details on our inrush current testing, please click here.
Inrush current is low with both voltage inputs.
Load Regulation And Efficiency Measurements
The first set of tests reveals the stability of the voltage rails and the 650 G1+’s efficiency. The applied load equals (approximately) 10 to 110 percent of the PSU's maximum load in increments of 10 percentage points.
We conducted two additional tests. During the first, we stressed the two minor rails (5V and 3.3V) with a high load, while the load at +12V was only 0.1A. This test reveals whether a PSU is compatible with Intel's C6/C7 sleep states or not. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.
|Test #||12V||5V||3.3V||5VSB||DC/AC (Watts)||Efficiency||Fan Speed||PSU Noise||Temps (In/Out)||PF/AC Volts|
|1||3.576A||2.015A||1.984A||1.013A||64.802||86.442%||795 RPM||18.3 dB(A)||38.76°C||0.886|
|2||8.145A||3.023A||2.977A||1.216A||129.273||90.043%||790 RPM||18.3 dB(A)||39.13°C||0.938|
|3||13.115A||3.531A||3.462A||1.421A||194.357||91.281%||790 RPM||18.3 dB(A)||39.64°C||0.955|
|4||18.091A||4.037A||3.979A||1.625A||259.574||91.559%||795 RPM||18.3 dB(A)||40.26°C||0.961|
|5||22.735A||5.048A||4.980A||1.830A||324.866||91.346%||790 RPM||18.3 dB(A)||40.89°C||0.965|
|6||27.323A||6.061A||5.980A||2.034A||389.395||90.902%||795 RPM||18.3 dB(A)||41.85°C||0.968|
|7||31.976A||7.074A||6.983A||2.238A||454.704||90.282%||925 RPM||22.3 dB(A)||42.84°C||0.969|
|8||36.636A||8.085A||7.988A||2.442A||520.001||89.492%||1260 RPM||32.1 dB(A)||44.15°C||0.971|
|9||41.698A||8.596A||8.479A||2.441A||584.918||88.629%||1500 RPM||36.9 dB(A)||45.21°C||0.971|
|10||46.500A||9.108A||9.003A||3.066A||649.742||87.574%||1735 RPM||42.1 dB(A)||45.92°C||0.972|
|11||51.902A||9.111A||9.010A||3.067A||714.566||86.542%||1915 RPM||42.2 dB(A)||46.76°C||0.972|
|CL1||0.132A||14.002A||13.999A||0.000A||117.255||81.801%||1125 RPM||29.0 dB(A)||43.43°C||0.937|
|CL2||54.003A||1.002A||0.998A||1.000A||663.533||87.681%||1780 RPM||40.5 dB(A)||44.53°C||0.972|
Load regulation was fairly tight on every rail, and the 650 G1+ easily met the 80 PLUS Gold standard's requirements, even under increased operating temperatures.
Its fan profile was relaxed up through 90% of the PSU's maximum rated load. Only during the full load and overload tests did noise exceed 40 dB(A).
These tests also exposed a significant platform weakness: low PF readings that, even under full load, do not exceed 0.98. Most PSUs achieve >0.99 under the same conditions. Obviously, this PSU's APFC circuit needs tuning in order to perform optimally.
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