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 measure is long, and the power-good signal is accurate. We do find a problem during those tests though: the power-good signal's ripple is too high, and we also notice some oscillations on the +12V rail.
For details on our inrush current testing, please click here.
The inrush current is crazy-high with both voltage inputs.
Load Regulation And Efficiency Measurements
The first set of tests reveals the stability of the voltage rails and the Caslon II’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||3.168A||1.947A||1.956A||0.982A||59.856||79.956%||1014 RPM||29.0 dB(A)||38.18°C||0.974|
|2||7.342A||2.925A||2.939A||1.182A||119.586||84.749%||1097 RPM||30.8 dB(A)||38.77°C||0.970|
|3||11.911A||3.414A||3.418A||1.385A||179.512||86.140%||1191 RPM||32.8 dB(A)||39.27°C||0.985|
|4||16.500A||3.903A||3.929A||1.589A||239.524||86.532%||1277 RPM||34.6 dB(A)||39.81°C||0.992|
|5||20.756A||4.894A||4.920A||1.794A||299.638||86.360%||1303 RPM||34.9 dB(A)||40.12°C||0.995|
|6||25.012A||5.884A||5.916A||2.002A||359.764||85.891%||1440 RPM||37.1 dB(A)||41.32°C||0.996|
|7||29.262A||6.885A||6.913A||2.211A||419.480||85.225%||1498 RPM||38.3 dB(A)||41.88°C||0.997|
|8||33.559A||7.885A||7.916A||2.422A||480.036||84.370%||1565 RPM||38.8 dB(A)||42.10°C||0.997|
|9||38.300A||8.378A||8.411A||2.429A||539.358||83.288%||1630 RPM||39.7 dB(A)||44.17°C||0.997|
|10||43.142A||8.876A||8.937A||2.539A||600.082||82.220%||1620 RPM||39.6 dB(A)||45.90°C||0.997|
|11||48.352A||8.865A||8.947A||2.542A||660.081||81.123%||1615 RPM||39.5 dB(A)||46.79°C||0.997|
|CL1||0.136A||14.004A||13.999A||0.000A||113.853||75.836%||1580 RPM||39.0 dB(A)||43.47°C||0.977|
|CL2||44.997A||1.002A||1.000A||1.000A||537.095||83.643%||1590 RPM||39.1 dB(A)||45.83°C||0.997|
Load regulation on the +12V rail is mediocre. Moreover, the Caslon II 600W's performance in our cross-load tests is bad, as expected, due to the secondary side's group regulation scheme.
Although the efficiency levels we measure are low, they satisfy the 80 PLUS Bronze requirements even under high operating temperatures. The fan profile does get aggressive, though. There is a slight reduction in fan speed during our full load and overload tests simply because that circuit is driven by the +12V rail, which drops notably during those tests.
The low-speed fan doesn't go above 40 dB(A). But even during our first test its noise output is close to 30 dB(A), so we can't exactly call it quiet, either.
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