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Using existing wires/cables with new PC power supply

Last response: in Components
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April 21, 2012 12:21:19 PM

There are various wires/cables that connect my PC power supply to the motherboard, hard disks, etc. If I replace the power supply can I just disconnect the existing cables from the current power supply and connect them to the new power supply or will the new power supply have its own cables that need to be used to connect it to the motherboard, hard disks, etc.?

A couple of other questions.

Do the mini-tower PCs use the regular size power supply or do they use a smaller one?

Which cable extension should I purchase to extend the existing power supply fan speed monitor connector cable? It comes out of the motherboard whenever I remove the power supply (to work on it) and it is very difficult to put it back in.

Thank you!
a c 243 ) Power supply
a b V Motherboard
April 21, 2012 12:48:43 PM

jss2020 said:
There are various wires/cables that connect my PC power supply to the motherboard, hard disks, etc. If I replace the power supply can I just disconnect the existing cables from the current power supply and connect them to the new power supply or will the new power supply have its own cables that need to be used to connect it to the motherboard, hard disks, etc.?

A couple of other questions.

Do the mini-tower PCs use the regular size power supply or do they use a smaller one?

Which cable extension should I purchase to extend the existing power supply fan speed monitor connector cable? It comes out of the motherboard whenever I remove the power supply (to work on it) and it is very difficult to put it back in.

Thank you!

1a) Generally no, but in some case's it's possible, as long as you're talking about a modular power supply
1b) Yes
2) Depends on the case
3) A 3 pin male to female fan extension cable

Haven't seen a fan cable on a psu since the Antec TPT, meaning you most likely have an older power supply, meaning that the chances of reusing your cable's is very slim.
Providing the make and model of the components will get you a more direct answer
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April 22, 2012 11:15:13 AM

Thanks for your response.

The computer is over 10 years old - a Sony VAIO PCV-RX690G mini-tower (not slim) with a Pentium 4. I am not sure what the make and model of the power supply is.

What should I look for in a power supply to ensure that it would work with this old computer which has two IDE drives and two DVD devices.

I want to replace the power supply because it has started making noise like a lawn mower. I think the fan in the power supply is hitting something even though I have ensured that it is not loose. Sometimes it sounds as if the fan is going to stop working altogether.
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Best solution

a c 243 ) Power supply
a b V Motherboard
April 22, 2012 12:02:36 PM

Sony VAIO PCV-RX690G

IMO, it's not worth putting money into it, but
http://www.cputopia.com/psu-replace-400-p-sony-pcv-rx69...
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a b ) Power supply
a b V Motherboard
April 22, 2012 1:00:25 PM

yup just buy a cheap 350-400w psu and you will be fine. its best to use the cabeling that comes with the new psu as powercables do degrade over time. as the plastic is supposed to be biodegradable...
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April 23, 2012 12:51:33 AM

HEXiT said:
yup just buy a cheap 350-400w psu and you will be fine. its best to use the cabeling that comes with the new psu as powercables do degrade over time. as the plastic is supposed to be biodegradable...


Thanks for your advice, HEXit!
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April 23, 2012 12:51:55 AM

Best answer selected by jss2020.
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