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34A 12V PSU for GTX 460 768MB and Athlon II X4?

post #1 of 11
Thread Starter 
Friend got a "broken" desktop from his brother. I fixed it by just changing 1 BIOS option, removing the CMOS battery, and swapping RAM slots.

It's an old rig from '06 and it has an Athlon 3500 (not familiar with it). The PSU is a 500W (not sure what brand or model). He said it had 34 Amps on the 12V rail. The PSU has green windows and a purple circular cathode inside. I have no idea what kind of quality/brand I'm dealing with here... Never heard of a PSU with windows.

My friend plans to upgrade to a Athlon II X4 640 and a GTX 460 768MB. Would ~408W on 12V rail be enough? How about if it was overclocked?
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post #2 of 11
Quote:
Originally Posted by Rpg2;11958105 
Friend got a "broken" desktop from his brother. I fixed it by just changing 1 BIOS option, removing the CMOS battery, and swapping RAM slots.

It's an old rig from '06 and it has an Athlon 3500 (not familiar with it). The PSU is a 500W (not sure what brand or model). He said it had 34 Amps on the 12V rail. The PSU has green windows and a purple circular cathode inside. I have no idea what kind of quality/brand I'm dealing with here... Never heard of a PSU with windows.

My friend plans to upgrade to a Athlon II X4 640 and a GTX 460 768MB. Would ~408W on 12V rail be enough? How about if it was overclocked?
Ew, that sounds like an Apevia power supply or something. I'm not so sure it's a good idea to put it to the test like that. redface.gif
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post #3 of 11
Yes, 34A on a +12v rail is more than enough, but what is questionable is the quality/brand of the PSU.

I would try searching for reviews online or something. Don't want to blow your shiny new GTX 460
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post #4 of 11
By the way, if this PSU has more than one +12V rail, then the total amperage capacity between the rails is not found by adding the rails together. I mean, if one rail is 16A, and the other is 18A, then that doesn't mean it has a +12V capacity of 34A. Instead, the only way to tell is to either divide the total wattage capacity of the +12V alone by 12, or to find some review of it where they estimated it.

For example: if it is this PSU, then I wouldn't bet on it having much more than a +12V capacity of 400W. Now, I realize that this thing doesn't have a purple cathode in it, but it does have a green transparent case. Unfortunately, its label does not say what the +12V's wattage capacity is! So, I wouldn't touch this PSU with a 10-foot pole.
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post #5 of 11
Just get a quality 400w corsair for him. You dont want to chance it. Althou i build a quad phenom system with 2gb ram,2 hdd's and 9500gt on a 250w winpower psu tongue.gif
post #6 of 11
Thread Starter 
Quote:
Originally Posted by TwoCables;11958164 
Ew, that sounds like an Apevia power supply or something. I'm not so sure it's a good idea to put it to the test like that. redface.gif

Friend is set on reusing as much of an old rig as possible. He is saving money for CPU, Mobo, RAM, and GPU.
Quote:
Originally Posted by BizzareRide;11958198 
Yes, 34A on a +12v rail is more than enough, but what is questionable is the quality/brand of the PSU.

I would try searching for reviews online or something. Don't want to blow your shiny new GTX 460

I don't even know the brand or model.
Quote:
Originally Posted by TwoCables;11958221 
By the way, if this PSU has more than one +12V rail, then the total amperage capacity between the rails is not found by adding the rails together. I mean, if one rail is 16A, and the other is 18A, then that doesn't mean it has a +12V capacity of 34A. Instead, the only way to tell is to either divide the total wattage capacity of the +12V alone by 12, or to find some review of it where they estimated it.

For example: if it is this PSU, then I wouldn't bet on it having much more than a +12V capacity of 400W. Now, I realize that this thing doesn't have a purple cathode in it, but it does have a green transparent case. Unfortunately, its label does not say what the +12V's wattage capacity is! So, I wouldn't touch this PSU with a 10-foot pole.

I personally haven't seen the rating sticker for the power supply. Friend told me it was 34A on the box. It's like a regular black PSU with green UV windows that lets you see inside of it.

That PSU you linked hurts my eyes. tongue.gif
Quote:
Originally Posted by shadow19935;11958222 
Just get a quality 400w corsair for him. You dont want to chance it. Althou i build a quad phenom system with 2gb ram,2 hdd's and 9500gt on a 250w winpower psu tongue.gif

Friend already has enough on the list of things to buy for it. He'll be reusing case, PSU, and HDD (IDE ribbons, gross).

Lol winspower. Hopefully it'll be enough.
Edited by Rpg2 - 1/14/11 at 10:01am
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post #7 of 11
Quote:
Originally Posted by Rpg2;12009160 
I personally haven't seen the rating sticker for the power supply. Friend told me it was 34A on the box. It's like a regular black PSU with green UV windows that lets you see inside of it.

It's crap. Don't recognize exactly what brand that would be, but any time a PSU tries to do the transparent thing, the result is a $40 PSU case with a $10 10yo PSU inside. Kill it with fire.
post #8 of 11
Quote:
Originally Posted by Rpg2;12009160 
Friend is set on reusing as much of an old rig as possible. He is saving money for CPU, Mobo, RAM, and GPU.
But the power supply is the single most important part of an entire system. He is basically investing his money (hard-earned money perhaps?) on good parts while neglecting the part that matters the most. It would be like building a great car, but then perhaps using a generic engine or something.

Or, it's kinda like the human heart. Let's say that instead of making babies the old-fashioned way, we can build new humans from the ground up in the same way that we can build a computer system. So, I have this analogy: what your friend is doing is no different from building a new human without caring about the quality of the heart. It's like, "Hey, let's build this human so that they can be an athlete, but let's save money by giving it a generic heart so that the rest of it can be just that much better". The end result would not be good for that human. Their heart wouldn't be able to handle the stress of their athletic activities for very long, and their heart may even kill them one day. Have you ever seen anyone who has a weak heart? That's the way a computer system is with a power supply like the one your friend wants to use.

So it's the same with the power supply: every single part of the entire system absolutely and completely depends on it. So it is a bad idea to invest a bunch of money on a nice system only to power it with a generic power supply, especially when one of the intended uses of the system is gaming (or also overclocking - but overclocking raises the importance of getting a quality PSU even more). I mean, power supplies are not all the same. It's possible to have 10 different 550W power supplies only to discover that just one of them can handle the system you've built. Sure, the others might handle it for a little while, but most of them would eventually spell disaster at some point in the future.
Quote:
Originally Posted by Rpg2;12009160 
I don't even know the brand or model.
This is actually another reason against using it. redface.gif
Quote:
Originally Posted by Rpg2;12009160 
I personally haven't seen the rating sticker for the power supply. Friend told me it was 34A on the box. It's like a regular black PSU with green UV windows that lets you see inside of it.
Like with most products, the harder the manufacturer tries to make it look visually appealing, the greater the chances are that the product is not very good (such as the ugly PSU I linked you to).
Quote:
Originally Posted by Rpg2;12009160 
That PSU you linked hurts my eyes. tongue.gif
lol yeah, it's an ugly little bastard! hehe
Quote:
Originally Posted by Rpg2;12009160 
Friend already has enough on the list of things to buy for it. He'll be reusing case, PSU, and HDD (IDE ribbons, gross).

Lol winspower. Hopefully it'll be enough.
Tell him that he doesn't have to spend that much on a power supply. Seriously: for the system he's putting together, all he needs is a quality 400-450W power supply. Sure, most good power supplies aren't as visually appealing (or as ugly?) as his, but that's just a sign that the manufacturer's money went into the quality of the power supply as opposed to its appearance.
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post #9 of 11
If you really want to save money I don't see why you can't get a average power supply (one that provides stable power but may not have the best voltage regulation/ripple). Having a poor power supply in any system is a recipe for disaster.
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post #10 of 11
Thread Starter 
Quote:
Originally Posted by Phaedrus2129;12009857 
It's crap. Don't recognize exactly what brand that would be, but any time a PSU tries to do the transparent thing, the result is a $40 PSU case with a $10 10yo PSU inside. Kill it with fire.

If only I could! I find it so disappointing when manufacturers spend more on the design than performance. Solid black PSU case is all anyone needs.
Quote:
Originally Posted by TwoCables;12012546 
-Epic Snip-

That's a great analogy! I'll be sure to pass it along. Problem is that my friend has decided to put off upgrading that computer for quite a while.
Quote:
Originally Posted by TickleMeElmo;12012638 
If you really want to save money I don't see why you can't get a average power supply (one that provides stable power but may not have the best voltage regulation/ripple). Having a poor power supply in any system is a recipe for disaster.

It's my friend, not me. If it was me, I'd personally go for something like the StealthXStream II from OCZ. That looks to be a good and cheap unit after rebate on Newegg. $50 for a quality 600W? Yes please! Seems like the best in that price range to boot!



Thanks guys! For now, my friend has put this upgrade list off and I suppose he'll deal with the PSU when it comes up in the future.
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