Nexus NX-5000 Silent PSU

SPECIFICATIONS

Power specifications can be found on the website or on a sticker on the side of the PSU itself:

The maximum current ratings for -12V and 5V standby are a little lower than we've seen on lower rated power supplies, but this is just a testament to the decreasing need for -12V in modern components, and the lower standby power consumption of new peripherals.

The NX-5000 complies with 80 Plus Bronze specifications, which requires, along with a handful of other power factor and input power tolerance requirements, at least 82% efficiency at 20% and 100% loads, and at least 85% efficiency at a 50% load. Keep in mind that the testing for 80 Plus approval is done at normal ambient room temperature. The 80 Plus Testing Guidelines (PDF) specify only that "ambient temperature shall be maintained at 23°C ± 5°C throughout the test." In contrast, the ambient temperature of the SPCR test system is directly proportionate to the load. At low load, the air intake is at or just above room temperature, but as load is increased, the temperature rises steadily. Typically, with a fan-cooled PSU, the intake temperature in our test system reaches 45~50°C at >600W loads. This is an extremely tough test condition, as PSU efficiency naturally drops off at high and low loads; combine high load with high temperature and it's essentially a torture chamber. It does replicate reasonably well the conditions that prevail in a typical tower PC. For full details, please refer to SPCR's PSU Test Platform V4.1.