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OCZ ZT 650W Power Supply Review

The OCZ ZT 650W is up against some very tough competition in this price sensitive sector, but it is a proficient design which is both technically capable and attractive. Being a fully modular design means that you never have to deal with the routing of surplus cables, a major selling point against other non modular designs in the same price zone.

Technically we have no concerns with this design, the unit delivers some exceptional efficiency results for an 80 Plus Bronze certified power supply and load regulation is impressive. It also dealt well with our cross loading tests, remaining stable under all conditions.

The ZT 650W passes our noise suppression tests with flying colours, achieving a maximum 35mV figure on the 12V+ output at full load, well within industry tolerance guidelines. The power supply managed to hold a 724W maximum load for a short time, before shutting down gracefully.

The 140mm Yate Loon fan is a good performer, although we feel that OCZ have opted for a slightly aggressive fan profile at the expense of a little noise. We wouldn’t say it was emitting intrusive levels of noise, but for a media center environment there are quieter alternatives.

UK pricing is said to be around the £79.99 inc vat point, which means this power supply offers good value for money. With the 5 year warranty there is also plenty of peace of mind, long term.


  • Excellent efficiency.
  • Pure modular.
  • Technically a very solid unit.
  • 5 year warranty.
  • Stable load delivery.


  • Slightly noisy under high loud.

Kitguru says: An excellent mid range power supply for an enthusiast gaming system.

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Rating: 8.5.

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