Power draw of power supply. 700watt vs 1000 watt, etc

[Dave Cramer]

On Sat, Jun 26, 2010 at 9:17 PM, ted leslie <tleslie-RBVUpeUoHUc at public.gmane.org> wrote:
>
> I am planning a new computer and have researched powersupplies.
> The
> Zalman ZM1000-HP
> seems to be the best (in my criterion of low noise, quality and power).
> But, I probably will only be grabbing 600-700watts from it (at this time) max.
>
> All things considered equal,
> what is the power draw of a 700watt PSU loaded up say 600watt in use,
> vs a 1000watt PSU loaded up to same 600watt use? (i have a suspicion its not 600watts in both)?
> In otherwords, I don't mind having the 1000watt unit for its quality and future expansion,
> but if it  ends up using 50-100-150-200 more watts (for what ever reason), and I run my PC 24/7,
> it may not be a case were getting the big rig is the smart choice.
> I know if you relate it to "class a" amp. theory, it has to be full power hungry so it can render
> the amplication immediately. And with a PC-PSU i don't know if to deliver 1000watts (when needed), it
> has to use more (to be prepared for immediate delivery when required) then a lesser watt PSU.
> In addition this Zalman unit says it can handle peak of 1250.
> Also, under equal loads, will the larger unit create more heat? i guess naturally if it did use more
> wattage, it would thus create more heat.
>
> I know you always want a supply that is rated for more wattage then you are going to ask for, with a decent
> (whatever that would be) buffer, but can you take a hit in your home hydro bill if you go for a
> monster supply (all be it "with same efficiency rating"?), and never use the extra room?
>

These are switching power supplies their efficiency is quite good. I
don't have exact values but I would expect them to be the same
regardless of the output

Dave
>

>
>
> --
> ted leslie <tleslie-RBVUpeUoHUc at public.gmane.org>
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