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Can I use a 20-pin PSU in a 24-pin board?

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  • Components
Last response: in Components
September 21, 2007 7:44:01 PM

Ok so I had a bunch of spare parts lying around so I decided to do a decent but cheap secondary build

Here's the stats:

Biostar Geforce 6100 mATX mobo
Athlon64 3000 1.8 GHz socket 939
XFX 6600GT 256MB
160GB IDE WD HDD, CD-RW. etc.
Cheap, but kinda cool looking Ultra mATX case

And to finish it off in the back of my closet I found an old Allied 350 watt psu, but it only has a 20-pin motherboard connector, but the motherboard has a 24-pin connector. I tried it and it does fit in, but I'm afraid to turn it on and I was wondering if it would work. So has anyone tried it? Also, I'm going to overclock this thing as far as it will go, will this limit me? I'm thinking that it might, but it's a fairly low power system so it might do OK. I really don't want to drop any cash on it since I've got a good system that I'm happy with. Any advice is appreciated.

More about : pin psu pin board

September 21, 2007 8:09:28 PM

Honestly I never mess around when it comes to power. Its a huge determining factor on the life of your components. With the price of power supplies from good companies as low as they are. Buy a new PS and save your self hours of trouble shooting with your OC.

September 21, 2007 8:29:01 PM

You can acquire a 20-24 pin adapter to match up. The 4 extra pins are extra 12V power lines and grounds. This allows more power to satiate the CPU and other devices on-board.

They considerably cheap, but I would run a few stress tests on it, just to be sure it will run stably.
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September 21, 2007 8:40:55 PM

be is right. The extra pins just supply additional current for the pre-existing voltages. If your old PS can provide enough +12V power, you'll be OK. The CPU and video card are the big users of +12V power.
September 21, 2007 9:12:47 PM

Thanks for the advice. I went ahead and fired it up and it seems to be running ok, and since this is only an extra comp I'm just not going to worry about the psu, but if I see a decent deal I'll probably pick up a better one.

Thanks again