Korean PC cooling specialist Zalman is preparing two new PSU models for the mid-range PC market, the ZM500-ST and ZM600-ST. As the names suggest, the ZM500-ST is a 500W PSU, and the ZM600-ST a 600W one. When placed in their price points (yet to be known), the manufacturer promises the two to have the best price-performance ratios. Both have non-modular, sleeved cabling with connectors most common to PSUs in the class. Both PSUs are ATX12V 2.3 compliant, have dual-forward switching circuitry, and are 80 Plus certified for high efficiency. The +12V circuit is built of two rails. Backed by a 3-year warranty, the two are expected to hit stores soon.