The conclusion of the ZS 650W is almost the same as the one for the ZS 750W. The ZS series targets the value oriented users so it doesn't utilize modern characteristics like DC-DC converters, modular design etc. On the other hand all the ZS units I reviewed/disassembled feature Japanese capacitors; high quality caps mean prolonged life and reliability.

The main problems of the ZS 650W are the short distance among the peripheral and SATA connectors and the high price which puts it in a very competitive category where you can find PSUs with better price/performance ratios. At the time of the review OCZ offered a mail in rebate which dropped its price down to $65. At this price ZS 650W becomes a really good deal and is highly recommended. However this review's rating is based on the official street price since mail in rebates are not permanent.