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OCZ ZX 1000W

Many companies have changed their product series over time and OCZ is no exception. Its brand used to be associated with enthusiast-targeted memory modules but now OCZ is closely associated with solid state drives. Power supply units are yet another field where the company is active.

Today we are going to take a look at OCZ’s highest-wattage product called ZX 1000W. Like the rest of the PSUs in this review, it is 80 PLUS Gold certified and only inferior to the senior Cougar in its wattage rating.

The Gold certification is confirmed not only by a logo on the PSU itself but also by the printed-out 80 PLUS Gold certificate.

Exterior Design

The exterior design of this OCZ product seems to be the most trivial among all the PSUs included into this review. It lacks the originality of the Cougar and Seasonic products and the eye-catching coloring of the Cooler Master.

It’s just a regular PSU with no distinguishing features. A big black fan peeps out of the black grid that covers the hole in the black case.

The absolute blackness is only relieved by the white spot of the label with electrical specifications and the white-and-yellow sides of the case.

Circuit Design

The hardware platform of the ZX 1000W is made by a manufacturer whose product we have not yet tested in our labs. Although the UL certificate number on the PSU label points at OCZ, the characteristic interior design and power rating help us identify the real maker as the Chinese Great Wall Company (do not confuse it with the namesake car manufacturer). This hardware platform is also used for Gold-certified PSUs selling under the Sparkle brand but, unlike the OCZ model, they are not all-modular and have fixed main cables.

The ZX 1000W has all the features you expect to find in a Gold-certified PSU: DC-DC converters for +3.3V and +5V voltages, an active PFC choke, and a card with connectors for modular cables with a lot of smoothing capacitors.

As opposed to the Cougar PSUs, the two DC-DC converters are identical in design.

Like in most high-efficiency PSUs, the heatsinks are rather small. Only one out of the two heatsinks has something like fins.

There is a PFC & PWM controller CM6802TAHX on the daughter card in the center of the PSU case.

The assembly quality is very high, just like with the rest of the PSUs in this review.

The PSU has Teapo capacitors rated for an operating temperature up to 105°C both at its input and output.

Cables and Connectors

The OCZ ZX 1000W is all modular. It has not a single fixed cable. It offers the following connectors for detachable cables:

  • One connector for a 20+4-pin mainboard cable
  • Two connectors for a 4+4-pin CPU cable
  • Six connectors for graphics card cables
  • Five connectors for peripheral power cables

Included with the PSU are:

  • One mainboard cable with a 20+4-pin connector (55 cm)
  • Two CPU cables with 4+4-pin connectors (55 cm)
  • Six graphics card cables with 6+2-pin connectors (55 cm)
  • Three cables with three PATA power connectors on each (54+15+15 cm)
  • Four cables with three SATA power connectors on each (54+15+15+ cm)

You can note that there are as many as seven power cables for the PSU’s five peripheral connectors: four with SATA and three with PATA connectors. This gives you more flexibility in configuring your system and choosing what cables are needed for it. You can use more SATA power cables for an advanced disk array or PATA ones for a large number of system fans.

The PSU lacks a floppy-drive connector (or an appropriate adapter). Yes, floppy drives are absolutely outdated already, but there are other devices that connect to the PSU in this way, for example the 5.25-inch I/O module of PCI-interfaced Creative X-Fi sound cards.


The auxiliary voltages (-12V and standby) are rather unusually combined with the +12V rail in the specifications, but there are no surprises otherwise. Like any other modern PSU, the OCZ ZX 1000W offers one high-capacity +12V rail and can deliver almost all of its full output power across it.

There is a substantial reserve of power on the +3.3V and +5V rails. Each has a load capacity of 30 amperes. Their combined load can be as high as 170 watts but no modern PC will ever need that much power from these two rails.

UPS Compatibility

Working with our APC SmartUPS SC 620, this power supply was stable at loads up to 383 watts when powered from the mains and could switch to the UPS’s batteries at loads up to 280 watts.

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