Load Regulation
| Test | 12V | 5V | 3.3V | 5VSB | DC/AC (Watts) | Efficiency | Fan Speed (RPM) | PSU Noise (dB[A]) | Temps (In/Out) | PF/AC Volts |
| 10% | 6.510A | 1.956A | 1.958A | 0.983A | 99.994 | 88.505% | 729 | 12.9 | 40.24°C | 0.988 |
| 12.043V | 5.113V | 3.371V | 5.088V | 112.982 | 42.08°C | 114.87V | ||||
| 20% | 14.044A | 2.937A | 2.942A | 1.182A | 199.942 | 91.84% | 728 | 12.5 | 40.68°C | 0.986 |
| 12.036V | 5.107V | 3.365V | 5.078V | 217.706 | 42.23°C | 114.84V | ||||
| 30% | 21.940A | 3.43A | 3.437A | 1.381A | 299.989 | 92.67% | 730 | 13.1 | 41.01°C | 0.992 |
| 12.029V | 5.102V | 3.361V | 5.068V | 323.717 | 44.6°C | 114.81V | ||||
| 40% | 29.801A | 3.923A | 3.932A | 1.582A | 399.522 | 92.653% | 733 | 13.6 | 41.7°C | 0.995 |
| 12.024V | 5.099V | 3.357V | 5.058V | 431.199 | 46.69°C | 114.77V | ||||
| 50% | 37.342A | 4.908A | 4.923A | 1.783A | 499.238 | 92.337% | 737 | 14.3 | 42.2°C | 0.996 |
| 12.017V | 5.094V | 3.352V | 5.048V | 540.668 | 49.42°C | 114.74V | ||||
| 60% | 44.956A | 5.895A | 5.915A | 1.985A | 599.774 | 91.84% | 741 | 13.8 | 42.56°C | 0.997 |
| 12.011V | 5.09V | 3.347V | 5.037V | 653.068 | 52.56°C | 114.7V | ||||
| 70% | 52.515A | 6.884A | 6.911A | 2.188A | 699.516 | 91.203% | 748 | 13.8 | 43.25°C | 0.998 |
| 12.004V | 5.085V | 3.343V | 5.027V | 766.986 | 57.23°C | 114.67V | ||||
| 80% | 60.150A | 7.872A | 7.908A | 2.292A | 799.557 | 90.447% | 808 | 15.5 | 43.66°C | 0.998 |
| 11.998V | 5.08V | 3.338V | 5.018V | 884.003 | 60.55°C | 114.62V | ||||
| 90% | 68.126A | 8.371A | 8.398A | 2.396A | 899.353 | 89.626% | 1052 | 23 | 44.38°C | 0.999 |
| 11.991V | 5.076V | 3.334V | 5.008V | 1003.454 | 61.79°C | 114.59V | ||||
| 100% | 75.914A | 8.872A | 8.921A | 3.006A | 999.381 | 88.726% | 1255 | 29.8 | 45.87°C | 0.999 |
| 11.983V | 5.071V | 3.329V | 4.99V | 1126.372 | 63.71°C | 114.55V | ||||
| 110% | 83.629A | 9.87A | 10.02A | 3.01A | 1099.961 | 87.95% | 1352 | 31.2 | 46.19°C | 0.999 |
| 11.977V | 5.065V | 3.323V | 4.983V | 1250.675 | 63.97°C | 114.5V | ||||
| CL1 | 0.116A | 14.177A | 14.24A | 0A | 121.29 | 84.482% | 748 | 13.8 | 40.7°C | 0.982 |
| 12.040V | 5.092V | 3.35V | 5.099V | 143.565 | 53.47°C | 114.86V | ||||
| CL2 | 0.115A | 21.559A | 0A | 0A | 111.317 | 82.517% | 748 | 13.8 | 41.54°C | 0.983 |
| 12.043V | 5.099V | 3.369V | 5.101V | 134.902 | 50.54°C | 114.87V | ||||
| CL3 | 0.115A | 0A | 21.63A | 0A | 73.994 | 76.723% | 744 | 13.7 | 41.22°C | 0.977 |
| 12.037V | 5.108V | 3.357V | 5.102V | 96.447 | 47.93°C | 114.88V | ||||
| CL4 | 83.406A | 0A | 0A | 0.001A | 999.949 | 89.492% | 797 | 15.4 | 45.2°C | 0.999 |
| 11.988V | 5.093V | 3.352V | 5.047V | 1117.365 | 61.72°C | 114.55V |
Load regulation is within 1% at 12V and 5V, but loose at 3.3V. It is improved at 12V, which is the most crucial rail.
| Test | 12V | 5V | 3.3V | 5VSB | DC/AC (Watts) | Efficiency | Fan Speed (RPM) | PSU Noise (dB[A]) | Temps (In/Out) | PF/AC Volts |
| 20W | 1.232A | 0.489A | 0.489A | 0.196A | 20 | 70.122% | 0 | <6.0 | 41.88°C | 0.821 |
| 12.050V | 5.116V | 3.374V | 5.107V | 28.522 | 36.23°C | 114.9V | ||||
| 40W | 2.712A | 0.684A | 0.684A | 0.294A | 39.999 | 80.563% | 0 | <6.0 | 46.21°C | 0.93 |
| 12.051V | 5.118V | 3.376V | 5.104V | 49.651 | 37.82°C | 114.89V | ||||
| 60W | 4.196A | 0.879A | 0.88A | 0.392A | 59.998 | 84.395% | 725 | 12.3 | 38.98°C | 0.966 |
| 12.041V | 5.117V | 3.375V | 5.101V | 71.093 | 43.15°C | 114.88V | ||||
| 80W | 5.676A | 1.075A | 1.076A | 0.49A | 79.944 | 86.46% | 729 | 12.9 | 39.32°C | 0.976 |
| 12.035V | 5.115V | 3.373V | 5.098V | 92.461 | 42.89°C | 114.88V |
A glance at the light loads table is always useful, as the PSU will typically operate at light loads.
Ripple Suppression
| Test | 12V | 5V | 3.3V | 5VSB | Pass/Fail |
| 10% Load | 31.6 mV | 15.0 mV | 15.5 mV | 15.5 mV | Pass |
| 20% Load | 28.7 mV | 16.6 mV | 16.3 mV | 16.0 mV | Pass |
| 30% Load | 25.2 mV | 15.2 mV | 16.5 mV | 15.8 mV | Pass |
| 40% Load | 24.9 mV | 16.1 mV | 16.9 mV | 16.4 mV | Pass |
| 50% Load | 25.4 mV | 16.4 mV | 17.0 mV | 17.9 mV | Pass |
| 60% Load | 25.3 mV | 16.9 mV | 16.3 mV | 18.3 mV | Pass |
| 70% Load | 26.0 mV | 15.9 mV | 16.8 mV | 22.5 mV | Pass |
| 80% Load | 26.1 mV | 16.1 mV | 17.0 mV | 26.1 mV | Pass |
| 90% Load | 27.6 mV | 17.4 mV | 18.4 mV | 27.9 mV | Pass |
| 100% Load | 27.5 mV | 15.5 mV | 16.7 mV | 26.2 mV | Pass |
| 110% Load | 28.7 mV | 15.9 mV | 16.8 mV | 27.2 mV | Pass |
| Crossload 1 | 30.0 mV | 16.1 mV | 15.9 mV | 17.6 mV | Pass |
| Crossload 2 | 31.6 mV | 21.9 mV | 16.9 mV | 19.5 mV | Pass |
| Crossload 3 | 30.9 mV | 15.4 mV | 18.2 mV | 18.6 mV | Pass |
| Crossload 4 | 26.8 mV | 14.8 mV | 15.4 mV | 18.7 mV | Pass |
Ripple suppression is good on all rails.
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The PowerZone has relatively loud transformer noise, even in standby. You can hear it from the next room. Otherwise, it’s electrically quiet — no coil whine or other weird stuff — but the base hum is quite loud. What about this one?
Can you recommend a power supply that’s completely silent, even in standby? I’ve tested a few and ended up sticking with the PowerZone 2 because it’s a good all-rounder and gets a lot of things right. But that low hum or faint squeal drives me crazy. Every morning I wake up thinking, “Damn, I forgot to switch off the power strip again before going to bed