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gamexstream 600w question

post #1 of 47
Thread Starter 
my psu has 72a on the 4 12v rails, while the more expensive pcp&c only has 49a? why is this?
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Chief Keef
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post #2 of 47
Simple: You dont add up the rails in one go.
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post #3 of 47
That is 72A over all the rails, not on a single rail.

Dont add all the rails together
    
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post #4 of 47
Thread Starter 
which cables use the 12v rails?
Chief Keef
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post #5 of 47
Take the number of Amps you think you have (72) and multiply it by the rail (12V rail = 12). So you're telling us that your 600W PSU is really a 864w PSU (without accounting for the other rails)?
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post #6 of 47
Yea basically one rail is more efficient than 4 or 2

Because with more rails you loose efficiency. That is why it is more costly
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post #7 of 47
Oh, and by the way, the PCP&P PSUs are more expensive because they are very stable, high quality, very little ripple, and operate at temperatures up to 40C and still provide rated power. Your OCZ doesn't offer any of those.
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Arthur 1.03
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post #8 of 47
Quote:
Originally Posted by mcogan10 View Post
someone feels that being an ******* will solve my question...
You've got me confused my man. I would be an ******* if I told you that you were a complete retard for buying an OCZ power supply. I would be honest and informative if I let you know the benefits of buying a quality PSU.

The OCZ has ripple issues, isn't the most stable, etc. That's why you bought it for so little money. Quality comes with a price tag. I'm sure that if you could have afforded it at the time you would have bought a PCP&P power supply, so I would be an ******* to hold it against you.

Your question has been answered. The PCP&P costs a lot because it's the creme de la creme of PSUs. You also can't add up the rails on a multi-rail PSU. Like I said, take the number of Amps and multiply it by the rail to see if your guess is off or not.

I'd (winging it here) say subtract about 2-4A a rail when you go over one to get your total.
Arthur 1.03
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Arthur 1.03
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post #9 of 47
Thread Starter 
thank you.
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Chief Keef
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post #10 of 47
Here's a basic PSU rundown.

You have three different power rails. the 3.3V, the 5V, and the 12V. A good modern PSU will have most of it's power going to the 12V rail, although the 12V isn't the only place your PSU draws power. It's the place your graphics card and your CPU draw power though, which are typically the most power hungry components in your machine.

So let's say you have two 12V rails (labeled 12V1 and 12V2) and they are both rated at 18A. Well unfortunately you don't have 36A on the 12V, since you lose a little power overall from having multiple rails. Your total Amps on the 12V would be about 30-32ish.

Now a lot of people will recommend a single rail PSU, and for a good reason. Let's say that your graphics card needs 20A by itself to run at full load. Well each of your rails only provide a max of 18A, which isn't enough. Since your PSU will divide your CPU (typically here) on one rail and the GFX on another, the extra (let's say) 5A that your CPU isn't using wont go to your graphics card... you lose that extra power because that rail is dedicated to something else.

PCP&C PSUs are single rail monsters that are rated to run while being shot at by a tank. That's why you pay a pretty penny for them.
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Arthur 1.03
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