Power Supply Roundup: 730W to 900W
by Christoph Katzer on November 22, 2007 3:00 AM EST- Posted in
- Cases/Cooling/PSUs
Voltage Ripple and Noise
Amacrox
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Antec
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Cooler Master
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Hiper 730
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Hiper 880
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OCZ
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Seasonic
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Silverstone
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None of the units exhibit very high ripple noise, though we still see differences. Amacrox in particular generates a good results with just up to 30mV on the 5vsb rail and less than 10mV on all others. Unfortunately, we can't report results for the Hiper 770W unit since we took it apart for further inspection before we could perform the o-scope tests. The other three units performed quite well and the 730W version in particular delivers no more than 8mV on the various rails.
Antec shows minor problems on the 5Vsb rail as well since it goes slightly out of spec, but the other rails are within spec. The Cooler Master M850 is good on the 12V rails, though 12V2 and V3 are showing strangely high results of up to 80mV. OCZ also shows minor flaws on most of the rails where we see peaks up to 80mV at higher load. This might sound high but it's still within specs and not much to worry about. Seasonic could perform better, since the results for the X900 are not worthy of a high-end unit like this. Throughout the test the X900 generated ripple of up to 40mV on the 5V rail, and the 12V rails don't look much better. Finally, at maximum load the Silverstone OP850 shows 36mV on the single 12V rail and also high ripple on the lower 3.3V and 5V rails.
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engman - Wednesday, January 23, 2008 - link
Can you explain beter the Voltage Ripple and Noise graphs?I really cant get it! Where is the graph scale?
engman - Wednesday, January 23, 2008 - link
I was trying to find a good PSU and found this review.When you say: "The actual Power Supply Design Guide specifies that each +12V rail should not have any ripple over 120mV and the +3.3V and +5V rails should not have any ripple over ~50mV."
Means that each power rail should not go outside this interval:
11.88V < 12V < 12.12V 120mV
3.25V < 3.30V < 3.35V 50mV
4.95V < 5V < 5.05V 50mV
Correct?
How can 12.17V fall inside the specified range? "The 12V rails of the OCZ ModXStream tended to be high, but this is still acceptable as they fall inside the specified range."
4.75V is inside the specs? and 5.13?
"The 5V rails also remain within specs, but the last two units (OCZ and Amacrox) are very close to the lower boundary at 100% load."
So what are the exac boundaries, or the voltage interval for each power rail?
thanks
yelnatsch517 - Thursday, December 6, 2007 - link
I noticed the Cooler Master reviewed was the M850 ESBA modular version of the RS 850 EMBA. Seeing as how it is impossible to find that model in the US, I am wondering if the model reviewed was either a EU version or a new model Cooler Master is planning on introducing in the near future and also whether the internals of the US EMBA 850watt version are the same.jonnyGURU - Friday, December 14, 2007 - link
The Cooler Masters are identical. Cooler Master refrains from selling the modular version in the U.S. due to Ultra's patent on the modular interface and threats to sue. You CAN buy the Cooler Master modular here in the U.S. if you get it bundled with a case. I've seen it pre-installed in some Stacker units over at Newegg.stolennomenclature - Tuesday, December 4, 2007 - link
I know im getting old and the old brain isnt what it used to be, but did'nt i read somewhere about dwindling oil reserves, skyrocketing oil prices, depletion of the ozone layer, and the need to reduce energy counsumption and be the green movement? I even thought I saw a trend with cpu makers trying to lower energy counsmption of their cpu's.You would'nt think any of this stuff was real when you see the trend towards bigger fuel guzzling SUV's and now a article like this - why on earth do we need kilowatt power supplies for a PC!
If I was in government id have these things banned or else slap an enormous tax on them.
People need to wake up and smell the roses. Its obscene that a PC should need a power supply over 300 watts. Even thats extravagant.
jonnyGURU - Friday, December 14, 2007 - link
A PSU only puts out what's asked of it. So if you're PC only uses 300W, the PSU only puts out 300W. Really the only drawback here is that larger units typically cost more to buy, and neither you nor I are in the position to tell someone how to spend their money. ;)ShadowStryder - Monday, November 26, 2007 - link
Persoanally I like the new review layout.Toadster - Saturday, November 24, 2007 - link
850W of goodness for under $190http://www.newegg.com/Product/Product.aspx?Item=N8...">http://www.newegg.com/Product/Product.a...=N82E168...
recently was on sale for $119 A/R
HexiumVII - Friday, November 23, 2007 - link
Who manufactures the Antec 750?Christoph Katzer - Saturday, November 24, 2007 - link
The 850? Enhance.