voltage needed

[i686]

hi'
reading a tech mag, I found an address interesting, or how to know how much voltage do you need.
it can't be exact, but gives a good idea ;)

here : http://www.extreme.outervision.com/PSUEngine

i686

ps; I should need 335 w, interpreted as 350w more or less ;)

[mantralord]

Those online PSU calculators overestimate wattage (not voltage) all the time. The system in your sig actually only draws about 200W or so.

[greenmaji]

Wattage is pretty much useless IMHO

It would be nice if they would give you the standard PSU rail %/W so you can figure out how much there recomending for the primary rail.

[i686]

hi'
as all these details and voltage wattage is a bit chinese for me, but I found that even if not completly exact, this would give a rough idea of how much you need to run your rig comfortably ...

I look at this because in OC the voltage of my psu isn't this stable, it's a 480w, but then quality enters the competition.
so to decide which psu to get in order to run a rig without any worry ... that's all.

is this calculator really useless?

i686

[i686]

Those online PSU calculators overestimate wattage (not voltage) all the time. The system in your sig actually only draws about 200W or so.
hi'
so, with the psu I have I should be ok?
I ask this because I see in many sig, pasu : 600 or even 700w,
what's that for, if a rough 400w should be enough and more if running sli?

there is something I don't get there ... :(

i686

[RollingThunder]

hi'
so, with the psu I have I should be ok?
I ask this because I see in many sig, pasu : 600 or even 700w,
what's that for, if a rough 400w should be enough and more if running sli?

there is something I don't get there ... :(

i686

686,

There is some good information above in the "PS Buyer's Guide."

http://www.ocforums.com/showpost.php?p=3502799&postcount=67

And here:

http://jonnyguru.com/reviews.php

What they are saying is those calculators are a starting guide but they don't describe amps needed in the rails. It's true that many 400 w power supplies calculate fine in those calculators but you must take it to the important step of determining the power supplied through the rails.

It's not quite as black and white as those wattage calculators try to make it.

[i686]

686,

There is some good information above in the "PS Buyer's Guide."

http://www.ocforums.com/showpost.php?p=3502799&postcount=67

And here:

http://jonnyguru.com/reviews.php

What they are saying is those calculators are a starting guide but they don't describe amps needed in the rails. It's true that many 400 w power supplies calculate fine in those calculators but you must take it to the important step of determining the power supplied through the rails.

It's not quite as black and white as those wattage calculators try to make it.
hi'
thanks for links and advice ;)
I undestand more now why I could OC my old prescott so easily and not my new conroe ... I need more watts!
might be just sort of 50w thing ...
so, I guess that my 12v rail isn't stable enough on the psu I have now ...
I'll make a few more tries before to think about changing for a fortron or enermaw or else, strong 12v rails ...
wait and see ;)
thanks again

i686

[billb]

hi'
thanks for links and advice ;)
I undestand more now why I could OC my old prescott so easily and not my new conroe ... I need more watts!
might be just sort of 50w thing ...
so, I guess that my 12v rail isn't stable enough on the psu I have now ...
I'll make a few more tries before to think about changing for a fortron or enermaw or else, strong 12v rails ...
wait and see ;)
thanks again

i686Also take into consideration the fact that there are no standards for power ratings. A $50, 500 watt PSU may only be able to put out it's 500 watts just before it bursts into flame. Whereas a conservatively rated PSU may put out 550 watts and still remain cool. You get what you pay for.

[i686]

hi'
don't worry, I'll go for a good brand with good reputation.
tagan don't make the best, I can agree with you as I see so many others talking about many big names as I mentionned ealier, but anyway, it ain't this bad ;)

i686