OCZ Z-Series Z1000M 1000W ATX PSU

Conclusion

Conclusion
 
OCZ Z-SeriesStarting with the basics, the OCZ Z-Series Z1000M is one very attractive unit. While most manufacturers are still kiting their PSU's out with drab black powdercoated cases, OCZ has pulled out all stops and gone for a gunmetal coloured brushed aluminium. Of course it does remain to be seen how this kind of finish will fit in with the various styles of cases. Black is always a safe bet as many a woman will tell you. But sometimes you've got to be different from the crowd, so it's good to see OCZ making this leap of faith. This also combined with the inset modular cabling system and overall compact size of the unit really does give full marks in the appearance stakes.
 
Still on the topic of appearance, the packaging of the Z1000M is also worthy of a mention. Once upon a time your new PSU would arrive loosely packaged inside a cardboard box with only a plastic bag to protect it from the elements. However on the Z1000M OCZ have pulled out all the stops, sandwiching the PSU between two chunky styrofoam slabs and placing it in a fabric drawstring bag. You also get a handful of other extras to get you up and running such as a bag of thumbscrews, some velcro cable ties and a nylon bag to store any unused modular cables inside. 
 
Moving on to the performance now, and one of the key features of the Z1000M is obviously its 80PLUS Gold rated efficiency. During the standard load tests (1-4) on the unit it managed to hold at least 90% efficiency at all times, sometimes going as high as 93% showing that this unit is certainly worthy of its title. Unfortunately the voltage stability did leave something to be desired on the +3.3v rail where it dipped by 0.20v from the idle to full load tests. The +5v and +12v rails however held things together much better, and while not having exceptional stability, still manage to produce good voltages at full load.
 
Cross-load and MAX-load results told a similar story with the +3.3v rail being the weak link in an otherwise fairly strong chain. Particularly impressive was the Z1000M's ability to hold a 1268W load at 50°C continuous. This potentially shows that the Z1000M is more than likely designed to be a 1100-1200W PSU under the surface with a 1000W sticker slapped on the top, making for a good value purchase based on the £177 tag over at Ebuyer.
 
Finally the ripple results from the +5v and +12v rails were also more than acceptable at 1000W load, staying under 60mV and 20mV respectively. The +3.3v ripple was just a tad higher that I would have liked at 40mV, but this is still 10mV below ATX recommended specs, so it's hard to grumble.
 
 
The Good
- Highest T1-T4 average efficiency of any PSU tested so far.
- Capable of punching well above its weight at 1268W.
- Not fazed by 50°C hot-box testing.
- Good ripple results on +5v and +12v rails.
- Priced below the competition.
- Good looks and compact dimensions.

The Mediocre
- Our sample was missing some Molex connectors (OCZ have already fixed this).
- +3.3v rail ripple results fairly average.
- Voltage stability of +3.3v rail pretty low at high loads.
 
The Bad
- Nowt.
 
 OC3D Recommended Award 
 
Thanks to OCZ for providing today's product for review. Discuss in our forums.
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Most Recent Comments

10-09-2009, 08:46:43

JN
"Today we take an exclusive first look at OCZ's 80PLUS Gold certified Z-Series Modular PSU. Can it hold its own in the OC3D labs? Read on to find out..."

http://www.overclock3d.net/gfx/artic...152531248s.jpg

OCZ Z-Series Z1000M 1000W ATX PSU

10-09-2009, 09:14:23

monkey7
You forgot the delta in the deltaTemp column header of the results table

why do I even see that O.o

Aside from that, great unit for high end rigs. Bring on the next gen graphics cards

10-09-2009, 09:15:29

Freak
I was taken back by the amount of amps that were on the 12 volt rail.

10-09-2009, 09:25:02

VonBlade
Impressive bit of kit. So many good products being released lately that we're almost starting to need a "OC3D top three recommendations" for catergories

Btw, did I miss the noise results? 100+cfm @ 30db sounds too good to be true.

Like the aluminium finish, just wish manu's would stop slapping big-ass stickers on them. We know what it can do, we've already brought it. Yeesh.

10-09-2009, 09:28:40

JN
Quote:
Originally Posted by name='monkey7'
You forgot the delta in the deltaTemp column header of the results table

why do I even see that O.o

Aside from that, great unit for high end rigs. Bring on the next gen graphics cards
Good spot. The stupid wysiwyg editor keeps stripping those out randomly

Quote:
Originally Posted by freak

I was taken back by the amount of amps that were on the 12 volt rail.
Yeah even I was pretty impressed by how much that unit was pumping out, especially for its size.

10-09-2009, 09:35:17

JN
Quote:
Originally Posted by name='VonBlade'
Impressive bit of kit. So many good products being released lately that we're almost starting to need a "OC3D top three recommendations" for catergories

Btw, did I miss the noise results? 100+cfm @ 30db sounds too good to be true.

Like the aluminium finish, just wish manu's would stop slapping big-ass stickers on them. We know what it can do, we've already brought it. Yeesh.
I dont really like to make any official noise comments on PSU's these days, but in the new 'Performance Overview' chart there is a 'Noise' section which I rate at either Low, Med or High based on how noisy it sounds at full load with my ear pressed against it.

The Z1000M certainly sounded low - in fact it hardly seemed to increase the fan speed (or at least the noise associated with a fan speed increase) through any of the loads.

I'm looking into a fan bypass switch for the load testers so I can briefly turn the fans off for long enough to hear the PSU. Thing is, even the bloody oscilloscope has a fan in it, so its never going to be a perfect analysis.

10-09-2009, 09:43:10

VonBlade
Thanks Jim. I know noise is stupidly subjective (I've got a 19db fan that sounds like a hurricane) but PSUs can be a source of noise it's impossible to rectify, unlike other cooling, so it's an important part in my decisions (which is still a HX series one).

Just a reasonable "loud, not so loud, is it on?" is absolutely fine, so thanks

I must have missed it in the performance chart. Overwhelming information lol.

10-09-2009, 10:32:05

JN
Quote:
Originally Posted by name='VonBlade'

I must have missed it in the performance chart. Overwhelming information lol.
Yeah if you're just looking for the low-down then the new overview charts is probably the way to go. It shows the percentage of voltage fluctuation from idle to full load (highlighting those PSU manufacturers that set their idle voltages really high to compensate for the amount of droop at load), Average efficiency and noise.

I'm also putting together a top 10 chart at the moment which will be sorted in order of performance for all PSU' I've tested in the last year or so.

10-09-2009, 14:20:52

monkey7
What if you make a fan connection like used in psu's with a 5-12v pot and connect the fans to it? You're already ripping open the psu anyway.

Sure it would not be completely accurate and still be subjective, but together with your while-testing super subjective measurements it should be a little more precise.
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