OCZ ZS series 650W power supply review

OCZ releases the ZS model in a three fold of models, a 550W model priced at 55 EUR, a 650 model priced at 65 EUR and a 750W model priced at 75 EUR (USD conversion is similar at the moment).The big question with it remain reasonably efficient and most of alls stable ? Today we'll grab a couple of other power supplies and see how efficient the PSU is and how well it behaves under load.
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