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Thread: Most important spec with stability between....

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    Default Most important spec with stability between....

    What is the most crucial/important spec with stability between Voltage Ripple Suppression, and Voltage regulation.
    Last edited by BTRY B 529th FA BN; 04-06-2013 at 11:45 AM.
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    I think you mean ripple suppresion.

    You can also add dynamic response to the list. And hold-up time. And efficiency.

    So that is five in the end:
    Voltage regulation, ripple suppression, dynamic response, hold-up time and efficiency.

    No clear opinion from me, but everything should be in spec. As for stuff like slightly superior v-reg vs slightly superior ripple suppression, I don't have an opinion. I don't care about efficiency all that much, unless it dips below 80% at common loads.

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    Do those also effect stability? I wouldn't think 'Efficiency' would be considered. ???
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    What is the most crucial/important spec with stability
    What kind of stability?

    Everyday web browsing and no blue screens of death?

    CPU OC to highest level?

    LIfe of entire system...cpu...mb vrm...PSU...over 5 or 10 years?

    Stability for critical applications requiring high loads, or extended up time?

    Stability in response to extremely variable input power sources...brown outs, voltage spikes?

    Just saying, your definition of stability is very dependent on what you are trying to achieve.

    Many extreme gamers fully expect their rigs to become obsolete in 3 years.
    Consequently, having the CPU burn out is not really that big of a concern.

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    When buying a PSU which spec is the more crucial one pay attention to for overall best stability. In my particular scenario I would be applying the bought PSU to an overclocked machine.
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    Well, voltage regulation is paramount for achieving consistent OC.

    However, ripple is a subset of voltage regulation.

    On a high end PSU you seldom have one without the other.

    From the most recent review on this site. (regarding good ripple suppression)

    http://www.jonnyguru.com/modules.php...tory4&reid=336

    And if I'm being perfectly honest, this is about the most important facet of performance for any unit. Yeah, 1% regulation would have been awesome, but it means little without the ripple suppression being excellent or very good as well. As it stands, I would take this unit any day over some unit that had 0% regulation but at spec ripple on any one rail.

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    Dynamic/transient response is even more important; it shows how the PSU copes with variable loading. The less the voltage dips/spikes and the less time it takes to settle down into a quasi-steady-state, the better. Because during the time that the PSU takes to re-enter stable regulation, VRMs on the devices need to work hard to keep the supply voltage stable. And if the VRM controller is slow to react to a sudden change, this increases the chances of instability.
    Careful what you wish for... You just might get it.

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    Quote Originally Posted by McSteel View Post
    Dynamic/transient response
    Is this included in the reviews? I'm guessing CL tests.. :hmm:
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    No, I don't mean crossload... I mean transient loading response. Meaning, how the PSU reacts to dynamic loading, for example going from idle desktop to full-blast prime95 and vice versa. Only a couple of review sites measure this, and with varying methods, and the ones I can think of off the top of my head are [H], TPU, PCPop and ChipHell.

    Ideally, the dips and spikes are to be as narrow and as shallow as possible, and they should be concave or flat (i.e. not rising/falling as a power function or an exponential function). These transient changes cause voltage overshoots or sags, in addition to an inevitable dips/spikes caused by ohmic resistance and transistor non-linearity. Under normal use they're of little consequence, but when you're pumping 25A into the CPU (which would be ~200A at the CPU VRM), a sudden dip while starting a benchmark could make or break the stability of an extreme overclock.

    It would be fun to see how a gradually intensifying benchmark would behave under extreme conditions. Wonder if anyone tried to make/modify one...
    Careful what you wish for... You just might get it.

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    Yeah, I like techpowerup because they have comparisons over all their reviews.(recent)

    http://www.techpowerup.com/reviews/N...2_1000W/8.html

    What I don't know, is how much difference for example, something around 1% on their advanced test compared to the very best .55 %

    http://www.techpowerup.com/reviews/Corsair/AX860/8.html

    ....what difference this makes in real life results(stability)

    Is there a direct correlation..?

    Have not seen any review sites doing testing.

    Better is better...but how does it translate?

    I just don't know or have enough experience to say.

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