OCZ Z1000M Regulation

+3.3V regulation
Load Voltage
10% +2.73%
20% +2.12%
50% +1.21%
80% -0.61%
100% -1.82%
110% -2.42%

+5V regulation
Load Voltage
10% +2.40%
20% +2.40%
50% +1.40%
80% +0.40%
100% -0.40%
110% -0.80%

+12V regulation
Load Voltage
10% +1.83%
20% +1.75%
50% +1.42%
80% +0.92%
100% +0.33%
110% +0.08%

The +12V rail is very stable and always above 12.00V. Only the +3.3V could use better regulation, as it shows a voltage drop of more than 5.15% during our test from 10% to 110% load. +5V starts sonewhat high and ends 0.80% under the optimal value.

Ripple and Noise

+3.3V ripple quality
Load Ripple and noise
10% 14.80mV
20% 18.40mV
50% 20.90mV
80% 28.50mV
100% 33.20mV
110% 35.30mV

+5V ripple quality
Load Ripple and noise
10% 20.90mV
20% 23.50mV
50% 27.90mV
80% 34.40mV
100% 42.60mV
110% 46.80mV

+12V ripple quality
Load Ripple and noise
10% 46.80mV
20% 57.30mV
50% 74.80mV
80% 90.30mV
100% 101.60mV
110% 118.30mV

OCZ has some small transients on +3.3V, while +12V shows a high ripple, but they are all still within specifications. While technically satisfactory, the results certainly aren't great for a very expensive PSU. 118mV on +12V and 47mV on +5V are both very close to the 120mV and/or 50mV limit.

OCZ Z1000M Overview OCZ Z1000M Noise, Efficiency, and PFC
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  • Marlin1975 - Thursday, December 9, 2010 - link

    How about more reviews on items that most would use, not a very small subset.

    I have a 600wat power supply and only bought that due to sale/coupon over the 500watt. My HTPC has a 380 etc...

    Test the PS's that are lowwer priced but still 80% rated and see if they really hold up for most builders.
  • Minion4Hire - Thursday, December 9, 2010 - link

    It has been a while since they did a large mid-range PSU roundup, but different people are in the market for different products.

    The thing is that the vast majority of mid-range power supplies ARE perfectly adequate for the vast majority of users in that market segment. Some are better, some are worse, but everything will generally come out okay. But if you're going to drop +$200 on a power supply it BETTER damn well perform! Of course if someone is looking to spend $20 on a 500W PSU for a gaming rig then they'll get what they're paying for.
  • Taft12 - Thursday, December 9, 2010 - link

    If modular is a requirement (and it should be for mid-range+) Seasonic M12II 520W or 620W is probably the best you can do in the $75-100 range.
  • michaelheath - Thursday, December 9, 2010 - link

    Minion, Taft, those are good responses but don't really address Martin's point: Why would I, a reasonable enthusiast who has a quad core CPU, a decent single GPU, a hard drive or two and a DVD burner, really care about what's going on in the 1000w+ PSU market? Other than pure curiosity? I need a 550w power supply at worst, and I too would like to see more reviews reflect the need of the majority of users. This article was interesting, but it's ultimately useless for ~95% of the readers viewing it.
  • MeanBruce - Friday, December 10, 2010 - link

    Useless is right!

    AnandTech for SSDs and Smartphones and Applegear.

    JonnyGuru.com for Power Supplies.

    Tom Logan at Overclock3D for cases, cooling, and motherboards.

    Experience is Everything!

    Experience is Everything!
  • poohbear - Sunday, December 12, 2010 - link

    Totally agree. Xmas is coming n we're all shopping, n they do a 1000wt psu review? This review is for da .01% of users out there, by da reviewers own admission, why even bother?
  • Martin Kaffei - Monday, December 13, 2010 - link

    3x 550

    1x 460

    1x 380

    1x 300
    coming soon
  • RagingForces - Thursday, December 9, 2010 - link

    Thanks for the article. I am in the market for these type PSUs and am glad to see a roundup article. This is why I come to Anandtech :)
  • Vicey - Thursday, December 9, 2010 - link

    I'm surprised that the AX1200 by Corsair wasn't included as to be honest that is the only PSU in the 1200W range I'd consider buying.
  • dajeepster - Thursday, December 9, 2010 - link

    I'm surprised too... I have both the Corsair AX1200 and the OCZZ1000

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