OCZ Z Series 850 W Power Supply Review

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Introduction

OCZ Z Series is the 80 Plus Gold-certified power supply family from OCZ, and so far they released an 850 W and a 1,000 W model. We have already reviewed the 1,000 W model, and let’s see now if the 850 W model will live up to the expectation.

Besides OCZ Z Series 1000 W, so far we’ve already reviewed two other 80 Plus Gold power supplies: Enermax MODU87+ 700 W and Seasonic X-Series 650 W.

If you read our review of the 1,000 W model you already know that both are basically the same power supply, with some components (rectifying bridges, primary capacitors and the addition of a third transistor on the active PFC circuit) upgraded on the 1,000 W model. Both models are manufactured by Highpower.

OCZ Z Series 850 W power supplyFigure 1: OCZ Z Series 850 W power supply.

OCZ Z Series 850 W power supplyFigure 2: OCZ Z Series 850 W power supply.

OCZ Z Series 850 W is relatively a short unit, being 6 ¼” (160 mm) deep, using a 135 mm fan on its bottom and active PFC circuit, of course.

Initially OCZ was going to offer two version of this power supply: with a modular cabling system and without. While some places may still have some models without the modular cabling system, OCZ won’t sell these anymore; they will be focusing exclusively on the modular cabling version.

The modular cabling system has eight connectors, with four cables permanently attached to the power supply. The cables included are:

  • Main motherboard cable with a 24-pin connector (no 20-pin option), 21 ½” (55 cm) long (permanently attached to the power supply).
  • One cable with two ATX12V connectors that together form one EPS12V connector, 24 3/8” (62 cm) long (permanently attached to the power supply).
  • One cable with one EPS12V connector, 24 3/8” (62 cm) long (permanently attached to the power supply).
  • Four cables with one six/eight-pin connector for video cards each, 23” (58.5 cm) long (modular cabling system).
  • One cable with three SATA power connectors, 24 3/8” (62 cm) to the first connector, 7 ¼” (18.5 cm) between connectors (permanently attached to the power supply).
  • Three cables with three SATA power connectors each, 18 7/8” (48 cm) to the first connector, 7 ½” (19 cm) between connectors (modular cabling system).
  • One cable with three standard peripheral power connectors and one floppy disk drive power connector, 20 7/8” (53 cm) to the first connector, 7 ¼” (18.5 cm) between connectors (modular cabling system).

The difference between the 850 W and the 1,000 W here is the presence of two extra video card power cables (the ones permanently attached to the unit) on the 1,000 W model; the rest is identical.  This configuration is very good for an 850 W product, providing four connectors for video cards, allowing you to connect two video cards that require two power connectors each, and twelve SATA power connectors. But we think a it could have two more video power cables for users willing to walk the extra mile and build a three-way SLI system, just like the 1,000 W unit.

OCZ Z Series 850 W power supplyFigure 3: Cables.

All cables use 18 AWG wires, which is the minimum recommended, with the main motherboard cable using thicker 16 AWG wires, which is great.

Now let’s take an in-depth look inside this power supply.

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Author: Gabriel Torres

Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.

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