Xigmatek NRP-PC402: Measurements
Efficiency meets 80 PLUS specifications:
Efficiency under different load profiles:
We have a suspicion that the Xigmatek NRP-PC402 is identical to its larger siblings, the NRP-PC502 and NRP-PC602. We have no other explanation as to why else this 400 W PSU would be able to handle loads of more than 650 W--over 60% above the specified wattage--without even breaking a sweat. It didn't shut down until we turned the load up to 674 W, and even then it easily started up again the next time we turned it on. All other test candidates shut down with overloads of just 15 to 20 percent.