PSU AMPS

BigBruiserAl

BigBruiserAl

BigBruiserAl

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Joined
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Co. Durham
Afternoon all.

Little help pls looking for a modular psu was going to get one of the new corsair 750/850 modulars but there website states max amps on both are 62A i have an old OCZ 700w non modular with 72A am i right in thinking i pretty much going to pay £120 odd for less power and gain a tidy case lol or have mis understood something?

ps. please dont turn this into a ocz psu sux corsair is best thread.

Thanks
 
BigBruiserAl said:
pay more for less power and gain a tidy case
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Pretty much sums up modular supplies. Also introduces another point of failure at the junction between cable and psu. Can't lose hey.

Not seen an 'ocz sucks' thread yet, but I daresay they're out there. I'm quite fond of ocz myself.

The corsair may well be 62A, but there is more to power supplies than raw power output. Needless to say, the £120 Corsairs will be great. I believe they are more respected than the ocz modular supplies, they certainly cost more. Bit surprised that the ocz isn't still running fine, do you just feel like a change?
 
yes just a change, i think the ocz psu is doing fantastic just modular will help the look in my antec 1200 hmm is not sure what 10A will mean i terms of usage for example will make it any differance @ 4ghz i7/p2 955 2 hdd and 2 280gtx
 
Anywhere around the 600-700W range with about 70A is fine, it doesn't make too much difference a couple of amps here and there.

And technically the power is only the wattage - the amps relate to current ;-)

Generally a modular PSU gives a couple of amps less per watt, and you get about 100W less for the same money (or about a tenner more for the modular of equal wattage).
 
Audigex said:
Anywhere around the 600-700W range with about 70A is fine, it doesn't make too much difference a couple of amps here and there.

And technically the power is only the wattage - the amps relate to current ;-)

Generally a modular PSU gives a couple of amps less per watt, and you get about 100W less for the same money (or about a tenner more for the modular of equal wattage).
Click to expand...

yeah thats whats confusing me my ocz 700w=72A corsair 850w=62A lol why is nothing simple:p
 
edit:

if you take a look at the small print, youll find the maximum combined 12v output for your ocz is actually 50a - the same as the 620w HX corsair.
 
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Audigex does make sense, even if it is worded a little strangely. We've probably all seen V=IR (with P=IV and derivatives) , but that doesn't mean it's all there is to it. For a start those are only applicable to constant currents, which is hardly what you find in a computer. It's not difficult to find '800W' psu's which are incapable of supplying a sustained current of 60 amps, just look at the cheap and nasty brands.

For example, the power rating of a psu is quoted at a given temperature. Budget ones tend to quote at 25 degrees, which is a con as the supply never runs that cool so can never supply it's rated wattage in a computer. PC power and cooling rate theirs at 50 degrees (my supply at least), which if anything is hotter than they'll see in a computer. This is part of why a 860W pc power and cooling will set you back £130, and I could find a 750W 'CIT' supply for 40 quid (at a high street store no less) within a minute on Google.

Manufacturers are less inclined to mislead with the ampere rating as you sell power supplies to the uninformed by writing high wattages on them, so you can very much find a wide variety of wattages at the same ampere rating.

The rest of the confusion comes from the one rail/multirail argument where it looks pretty hard to find consensus on which is better, and when you take supplies apart they internals don't always reflect how many rails they claim to have.

So, given modular supplies carry a premium in manufacturing cost, design, and because people want tidy cables, I can well believe that at constant price 'Generally a modular PSU gives a couple of amps less per watt.'
 
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