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Old 10-23-2010, 02:27 AM   #1 (permalink)
 
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Default Question about 8-pin vs. 4-pin 12V rails

First off, this is the motherboard I have (got it for free):
Newegg.com - EVGA 132-CK-NF79-A1 LGA 775 NVIDIA nForce 790i Ultra SLI ATX Intel Motherboard

It has an 8-pin connector in the top left where I would expect a 4-pin connector

I have two GTX 275's I want to run on this thing, as well as a Q9550.

My question is, will a power supply with a single 4-pin 12V connector (like this one) work? Or will I have to find and buy one with an 8-pin connector, like this one?

Thanks for any answers.

EDIT: Also, what's the cheapest name-brand (Corsair, Antec, etc) PSU you'd reccomend? This is really a budget build. The video cards and motherboard were given to me
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Old 10-23-2010, 04:45 AM   #2 (permalink)
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Default Re: Question about 8-pin vs. 4-pin 12V rails

The corsair has a 4/8 pin just like the xclio so it will work.
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Old 10-23-2010, 05:22 AM   #3 (permalink)
 
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Default Re: Question about 8-pin vs. 4-pin 12V rails

Do you think there are any cheaper that would support the cards?

And I didn't realize the Corsair one had an 8 pin.. Would a PSU with a four pin connector work? I've read somewhere that it doesnt matter, but I could be wrong.
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Old 10-23-2010, 05:50 AM   #4 (permalink)
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Default Re: Question about 8-pin vs. 4-pin 12V rails

I had a motherboard which was designed for an 8 pin connector, and it worked fine with a 4 pin connector in it.

Also, if you use a motherboard with an integrated GPU, it even works even if you just have a 20-pin connector.
The extra 4 pins on a 24-pin connector is to provide power for PCI-E video cards.
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Old 10-23-2010, 11:24 PM   #5 (permalink)
 
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Default Re: Question about 8-pin vs. 4-pin 12V rails

I went ahead and bought the Corsair PSU. wasnt too bad of a price after MIR. I'll take pictures when I have it assembled. I'm putting it in an old beige Dell XPS case
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