Antec has unveiled two new Signature power supplies, one offers 850W and the other one is a 650W model. Both models have an efficiency of 82% at 20% and 100% load and up to 85% efficiency at 50% load.
According to Antec, the two new Signature units can hit 82% efficiency at 20% and 100% load levels, and they achieve 85% efficiency at a 50% load. These PSUs also feature dual power circuit boards (to optimize airflow, the company says), a pulse-width-modulation fan capable of running at just 15% of its maximum speed, and a hybrid cable management system, which hard-wires necessary cables into the PSU to keep resistance low. Antec also touts its active DC-to-DC voltage regulation system, which supposedly cuts transient response times by two orders of magnitude and improves system stability in the process.
Unfortunately the Antec Signature PSUs are rather expensive, the 650W model has a MSRP of $249 and the 850W model costs $299.