OCZ ModXstream Pro 500w



PSU's are a real case of you get what you pay for. The cheaper, non branded PSU's are often incredibly unstable, in-efficient and can fail within a few months of purchase. Installing such PSU's in a high-end PC is akin to having a death wish, but only for your hardware. Not only can  low or poorly filtered voltages cause damage to devices that don't employ their own filtering circuits, but surges that often occur when a PSU fails have the ability to decimate every single component inside your precious PC system.

A few months ago we reviewed OCZ's 780w ModXstream model, whilst it certainly scored well in our testing and managed to bag our Recommended award, there was still room for improvement. This undoubtedly spurred the release of the ModXstream Pro series announced back in August. Equipped with a larger fan, new internals and a refreshing new look,  the 'Pro' is aimed at bringing down noise and improving on the performance of it's predecessor. It should certainly come as no surprise then, that when OCZ asked us if we would like to take a look, we couldn't resist.

Here are the full specifications:

150 x 160 x 86mm (W x L x H)
ATX12V v2.2 and EPS12V
Typical load 86% Efficiency
80+ Certified
Overvoltage/OverPower/Short-Circuit protection
(.99)Active PFC
MTBF: 100,000 hours @ 25C

1 x 20/24-pin ATX
1 x 8-pin CPU
1 x 4-pin CPU

Modular Connectors:
1 x 6-pin PCI-E
1 x 6+2-pin PCI-E
4 x Peripheral
2 x Floppy
6 x SATA

As we can see, the ModXstream has a fairly average spec for a modern PSU, with 86% efficiency and 100,000hr MTBF at 25c.  The PCI-e connectors are also noteworthy, with OCZ opting for 1x 6-pin and 1x 8-pin plugs allowing for the unit to be used with a wide range of modern graphics cards such as the GTX280, 4870x2 and GTX295. Of course, whether the 500w unit has enough gusto to power such cards in addition to a full PC system is yet to be determined.

Unlike the OCZ EliteXstream we reviewed a while back the ModXStream Pro features two +12v rails rated limited to 18A each. Interestingly OCZ rate the maximum output of both rails as 423w which when converted into amps produces a result of 36A (or 18A x2). This in essence indicates that providing the draw on the +5v and +3.3v rails comes to less than 68w, the +12v1 and +12v2 rails can deliver their full 18A ratings.
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Most Recent Comments

27-01-2009, 11:10:54

"With Modular cables, a 14cm quiet fan and 500 watts of power, can OCZ's ModXstream 500w take the mid-range crown?" - by Tom Koflach


OCZ ModXstream Pro 500wQuote

27-01-2009, 11:26:31

first, thanks for the review Jim, and now, coments: it looks pretty good for a 500w psu, the temps of it aren't bad, it does it job well, its silent, and isnt expensive at all, maybe this is another one for me to chose? im still having trouble at choosing 500w modular psu's. i think i still have the corsair as my top.

Anyways, great review man


27-01-2009, 11:28:35

Nice review It's certainly interesting to see another of the OCZ lower budget series, the StealthXstream were already very interesting.

I don't think it can compete with the cooler master m520 when it's about price though. The ModXstream retails for €65.- in the Netherlands while me m520 is about €7-8 cheaper. May not sound like a lot but most of the time these psu's are used in low budget builds where every penny counts.

I think it would be a good idea to make three PSU roundups. For low (400w-), mid (400-700w) and high (700w+) units. That way it's easy to compare the reviewed supplies

To be continued, have to eat now Quote

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