OCZ ZS Series 750 W Review 0

OCZ ZS Series 750 W Review


We would like to thank OCZ for supplying the review sample.

Lately something is going on in the OCZ PSU department (or PC Power & Cooling). After the release of the fine, high-end, ZX series a new series, ZS, follows. This series, contrary to the ZX one, addresses the value-oriented users so in its members you won’t find exotic characteristics like fully modular cabling systems, Gold efficiency, DC-DC converters and so on. Following this path OCZ managed to keep the prices of ZS units at low levels so whoever wants a reliable PSU from a known brand like OCZ and doesn’t mind the lack of modular cables will sufficiently cover his power demands.

The ZS series consists of three members with capacities ranging from 550W to 750W. The first two PSUs have only two PCIe connectors while the highest capacity one has four PCIe. All units feature a single +12V rail and their continuous output is rated at 40°C and not at 50°C, which is recommended by ATX spec. The ZS members are covered by OCZ’s three year power swap warranty and promise reliability, low noise and high efficiency. Speaking of efficiency all ZS are 80 PLUS Bronze certified.

In today’s review we will torture a ZS 750W in order to reveal everything about its performance and at the same time find out how reliable it is, because in a PSU reliability is the most crucial characteristic and everything else follows. But enough with the long prologue, it’s time to skip to the main review.


OCZ ZS 750W Features & Specs
Max. DC Output750W
Efficiency80 Plus Bronze
Operating temperature10°C - 40°C
ProtectionsOver Voltage Protection
Under Voltage Protection
Over Current Protection
Short Circuit Protection
Cooling135 mm load controlled double ball-bearing Fan
Dimensions150 mm (W) x 86 mm (H) x 160 mm (D)
Weight2.0 kg
ComplianceATX12V v2.2, EPS 2.91
Warranty3 years
Price at time of review$99.99

The unit's continuous power output is rated only up to 40°C and on top of that it does not feature OTP (Over Temperature Protection). This is something that doesn't look so good.
Its dimensions are the normal ones and the same goes for its weight. Finally with a $100 price tag it will meet hard competition (like Corsair TX750 V2) but with the mail in rebates (in the U.S.) you can find it for as low as $74.99 and with this price it's a really good deal for a branded 750W unit.

OCZ ZS 750W Power Specs
Max. Power22A22A54A3A0.3A
Total Max. Power750W

There is only one +12V rail whose max power indicates that DC-DC converters are absent from this unit, for the minor rails generation. The max combined power of the minor rails is more than sufficient for a contemporary system and 5VSB are strong enough with 3A max power.

Cables & Connectors, Power Distribution

Native Cables
ATX connector (495 mm)20+4 pin
4+4 pin EPS12V (670 mm)1
6+2 pin PCIe (530 mm)1
6+2 pin PCIe (610 mm)1
6 pin PCIe (550 mm)1
6 pin PCIe (620 mm)1
4 pin Molex (610 mm+85 mm+85 mm+85 mm)4
SATA (390 mm+85 mm+85 mm+85 mm)4
SATA (720 mm+85 mm+85 mm+85 mm)4

The 24 pin ATX cable is a little short, we would like to see additional 100 mm here. Strangely enough the EPS cable is quite long at 670 mm.
There are four PCIe connectors (two 6+2 pin and two 6 pin) with each one attached in a different length from the remaining cable. We don't recall ever seeing something similar! Also as you will notice from the table above there are no FDD connectors in this PSU. Finally one company decided to get rid of this scarcely used connector. The main problem we spotted in the cables of ZS 750W is the distance among the peripheral and the SATA connectors which is too short, only 85 mm and we also did not like the fact that the wires among these connectors are not sleeved.
Finally, all connectors use 18 AWG wires, the minimum size gauge that ATX spec requires.

Since this PSU features a single +12V rail we do not have anything to comment about its power distribution.


Although ZS series targets the value-oriented gaming rings the package lacks vivid colors and playful schemes. In other words the packaging is too serious for a PSU that addresses the gaming community. Nevertheless the box is there only to protect the product and its design affects only the users that decide their next buy in the shop by looking at the product packaging without reading any reviews, something that may be disastrous for their wallets and even their systems at some times, since we are talking about PSUs here.
On the face of the box we find a photo of the unit on a dark background and right next to it there is a brief characteristics reference. On the rear side we find the same photo along with more details about its features. Finally, on the bottom and the top side there are the technical specifications/connector description and the power specifications respectively.

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