The Antec Phantom 500w was placed under a load of 406 watts. This counts for a total of 81% of the power supplies rated output. At this load, the power supply required 476 watts from the mains to produce the 406 watts required by our custom made power supply tester.
Therefore the efficiency of this power supply can be found by a simple equation: (406 / 476) * 100 that works out to be an efficiency rating of 85.2%. Noise Testing
At present Overclock3D doesn't have the professional equipment required to reliably measure the noise output of devices. However, as a new part of our testing procedure we will be recording the PSU at idle and load so that you can make your own judgments. All recordings are taken at 30cm distance from the unit.
Idle Recording - Not required. Unit makes no noise!
Load Recording - Download
At idle the Phantom made no noise at all! This is due to passive cooling utilised by the unit working effectively.
After around 10 minutes under full load, the Phantom powered up the 80mm fan to deal with the increasing temperatures. The fan appeared to run at 100% speed throughout, but was never noisy or intrusive. With the Phantom 500w installed inside a case I was once again unable to hear the unit!