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Question about replacing older computers power supplies (atx 1.3)

post #1 of 15
Thread Starter 
I got a couple questions about replacing power supplies on older computers that came with say an atx 1.3 power supply originally

1. is the easiest way to identify an atx 1.3 (or at least pre 2.0) the lack of the 4 pin connector?

2. When replacing a dead atx 1.3 power supply that say was 250w originally. Would replacing it with an 350w (say the antec basicq 350w) modern atx power supply be a bad idea?


basically the reasoning behind this is we get older machines from time to time that come in with just a dead power supply so its not an expensive fix (the antec 350w basiq is the cheapest one we carry) and im just curious if its a bad idea to replace one of those atx 1.3 power supplies with a cheap modern atx power supply?
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post #2 of 15
If you buy a newer one it will not be a problem. see here http://en.wikipedia.org/wiki/ATX#ATX12V_1.3

if you look at the rest higher version just made the psu more efficient. unless this applies

Quote:
ATX12V 1.2
A relatively minor revision from January 2002. The only significant change was that the −5 V rail was no longer required (it became optional). This voltage was very rarely used, only on some old systems with some ISA add-on cards
.

oh and this http://en.wikipedia.org/wiki/ATX#Int...old.2Fnew_PSUs

But as your question tho no its not a bad idea at all, you would prob be fine, but i would get this instead http://www.newegg.com/Product/Produc...82E16817151086 less reports of it blowing up compared to the antec one you are talking about.
Edited by terraprime - 8/11/11 at 12:06am
 
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post #3 of 15
Personally, I've never had an issue with that. Well... I take that back. I had ONE issue. I had an old Compaq that had a bad PSU. I purchased a new PSU off NewEgg and hooked it up. Pressed the power button and heard a loud *CRACK* followed by a BRIGHT flash of light. That computer never worked again. But after doing some digging, I found out that particular Compaq computer had a different pinout than most other PSU's, so you had to buy a Compaq PSU for it, and I really think that was an exception, and not the general rule.

TL;DR I think you'll be fine with that, just make sure colors on the wires match up to be 100% sure.
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post #4 of 15
Thread Starter 
Quote:
Originally Posted by terraprime View Post
If you buy a newer one it will not be a problem. see here http://en.wikipedia.org/wiki/ATX#ATX12V_1.3

if you look at the rest higher version just made the psu more efficient. unless this applies

.

oh and this
what about

"The power on 3.3 V and 5 V rails was significantly reduced." that was on 2.0
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post #5 of 15
what is the cpu you are using in it? Or even a model number of the pc if it not home built.
 
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post #6 of 15
Thread Starter 
Quote:
Originally Posted by terraprime View Post
what is the cpu you are using in it? Or even a model number of the pc if it not home built.
this is not in regards to a specific computer
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post #7 of 15
Well then as it says if its a Pre P4/Athlon XP pc then you will need to find a compliant psu since power delivery has changed alot since then.

And as said above some prebuilts run proprietary PSU in there systems like dell, compaq, hp and so on. As in the article I linked it mention how dell systems that used PII and PIIIs there psu's and motherboard were not wired to the ATX spec on the 20pin plug.
Edited by terraprime - 8/11/11 at 12:27am
 
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post #8 of 15
Yes, and no, respectively.

There used to be Zippy/Emacs ATX units you could find around, but they've disappeared off the market. They were some of the best around, though loud. I'm selling a Zippy/Emacs AP2-5300F-RV2 300W for $35.

There's also the Rosewill ATX 1.3 unit on Newegg. It's made by ATNG, and is passable in quality and performance, but will do in a pinch.
post #9 of 15
Thread Starter 
Quote:
Originally Posted by Phaedrus2129 View Post
Yes, and no, respectively.

There used to be Zippy/Emacs ATX units you could find around, but they've disappeared off the market. They were some of the best around, though loud. I'm selling a Zippy/Emacs AP2-5300F-RV2 300W for $35.

There's also the Rosewill ATX 1.3 unit on Newegg. It's made by ATNG, and is passable in quality and performance, but will do in a pinch.
unfortunetly at work i dont have access to any atx 1.3 units, the only thing i have is that antec basicq 350w.

Should i not be using that as a replacement or is it not likely to be a bother to the average consumer?
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post #10 of 15
It might cause instability with "higher-end" Pentium III systems, due to crossloading throwing the voltage off.
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