"The ZS Series is the latest mainstream power supply series from OCZ. Available in 550 W, 650 W, and 750 W versions, these models don't come with a modular cabling system. Let's see if the 650 W version is a good buy."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips