Antec Signature 850W Power Supply Review

“Looking at performance, we saw voltage drops on the lower voltage rails as well as on the 12V rails. All of the rails perform well within specs but a drop of up to 5% is not small. As for the quality of the output, we measured a very small ripple of up to 26mV on one of the 12V rails.

Buyers of the Signature series can be happy with efficient work, as this unit achieved up to 87% efficiency. Even with lower input voltages, the unit manages up to 85% with 120VAC and up to 83% with 90VAC. These results are some of the best this year, and if the 650W version performs this well it will be a very good competitor to other offerings. That said, the 850W unit should not be used (i.e. it's overkill) with PCs that require less than 150W of power most of the time, as the efficiency is not good enough below this point. This PSU works best with a minimum of 400W power draw.”