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Tom's Hardware > Forum > Motherboards & Memory > Abit > 4pin molex connector on atx power supply and mobos ?

4pin molex connector on atx power supply and mobos ?

Forum Motherboards & Memory : Abit 4pin molex connector on atx power supply and mobos ?

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batman1978   05-14-2009 at 07:06:37 AM

Hello :hello:

 


Most ATX power supply for p4, athlons and such have a 4pin square connector called 4pin molex for p4, or so ive read. to give an idea of what connector im talking about i put this pic here

 

http://www.helpwithpcs.com/courses [...] nector.gif

 

or at this motherboard pic (its to the right of the 24pin molex mobo connector)
http://www.abit.com.tw/upload/products/NF7-S_pic6.jpg

   

Question is, , i have it currently unpluged.. what exactly does this molex connector do? just wanna know if ill have any problems if i dont plug it... and ive found very little information on the internet about it

  


(Abit NF7 v 2.0 mobo with an Athlon XP 2400 cpu)

 


Thanks :bounce:

 


Message edited by batman1978 on 05-14-2009 at 07:09:29 AM
Reply to batman1978
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Crashman   05-14-2009 at 07:56:00 AM

It's called an ATX12V connector and it's supposed to power the CPU voltage regulator. Your system isn't supposed to run without it.

Message quoted 1 times
Reply to Crashman
batman1978   05-14-2009 at 06:14:17 PM

I see, since i dont know what a cpu voltage regulator's is
I'll rephrase my question.

 


Will my system fail or will i have fried cpu (or mobo) if i don't plug this? or is there any other thing that is likely to fail? maybe the power supply itself?

 

This PC has been running 24/7 for months (like 3 months give or take) without plugging this connector..
Running demanding games and such.

 

(I'm using this power supply that doesn't have that connector) And I was thinking on moving this power supply to another similar system (an amd sempron64, i repeat, currently its running on an Amd AthlonXp w/o problems so far)

  

Thanks for your help

Message quoted 1 times
Message edited by batman1978 on 05-14-2009 at 06:25:22 PM
Reply to batman1978
Crashman   05-14-2009 at 06:31:52 PM

batman1978 wrote :

I see, since i dont know what a cpu voltage regulator's is
I'll rephrase my question.


Will my system fail or will i have fried cpu (or mobo) if i don't plug this? or is there any other thing that is likely to fail? maybe the power supply itself?

This PC has been running 24/7 for months (like 3 months give or take) without plugging this connector..
Running demanding games and such.

(I'm using this power supply that doesn't have that connector) And I was thinking on moving this power supply to another similar system (an amd sempron64, i repeat, currently its running on an Amd AthlonXp w/o problems so far)



Thanks for your help



It shouldn't hurt anything, I'm just suprised it runs. The CPU voltage regulator is what POWERS the CPU.

Reply to Crashman
nmliz   02-19-2010 at 09:36:58 PM

I had the same question and found the answer here.

I believe the 4-pin molex connector is the auxiliary power connector, and if the original poster replaced the power supply with a new 24-pin connector (instead of the old 20-pin one), then you shouldn't need the square, 4-pin molex.

Message quoted 1 times
Reply to nmliz
Crashman   02-19-2010 at 09:54:37 PM

nmliz wrote :

I had the same question and found the answer here.

I believe the 4-pin molex connector is the auxiliary power connector, and if the original poster replaced the power supply with a new 24-pin connector (instead of the old 20-pin one), then you shouldn't need the square, 4-pin molex.



No, the 24-pin connector was adopted to add more power pins for PCI-Express, as was the flat 4-pin auxiliary power connector. The square 4-pin CPU power connector is supposed to be on a completely different circuit (and the 8-pin version is just a higher-amperage version of the 4-pin square power connection).

Reply to Crashman
shoopz   03-10-2010 at 12:17:41 AM

my mother board does not need the atx 4pin but my psu has a 20+4. Can I take the atx 4 pin and use it for something else? I have been looking for a converter or adaptor to make it in to a molex so I can use it. Any thoughts? I would like to use it to power my fan controller witch will have 4 fans plugged in to it.

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