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My new Mobo has 8-pin EATX12 V cpu plug but my PSU only has the 4pin?

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October 1, 2010 4:58:40 PM

I'm going to build a new PC in a couple weeks and my new Mobo is a 1366 ASUS P6X58D-E the manual clearly states: Do not forget to connect the 8-pin EATX12 V power plug; otherwise, the system will not boot.

The motherboard arrived with a little plastic insert covering 4 of the 8 holes on the 12v socket. Do I just use one of the 4 pins? Any help would be greatly appreciated.

See the problem is I only have one 1 x 4-Pin ATX 12V connector. So am I screwed or what ? Do I have to buy a PSU now ? I thought I read that you don't have to use a 8-pin EATX12 V power plug that you could just use a 4 pin and thats why they have a cap on four of them.

I got the Core i7-950 but I'm not planning to OC. My PSU Antec earthwatts EA430 430W Continuous Power ATX12V v2.0 80 PLUS Certified Active PFC Power Supply.

The connectors my PSU has is

1 x Main connector (20+4Pin)
1 x 4-Pin ATX 12V
6 x Peripheral
4 x SATA
1 x Floppy
1 x PCI-E

Any help would be greatly appreciated.
a b V Motherboard
October 1, 2010 5:15:28 PM

Quote:
Do I just use one of the 4 pins?


Yes. The 4 pin connector provides the same 12v power to the CPU as the 8, but with less ground.
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October 1, 2010 8:27:47 PM

Would it be best if I replaced my PSU ? I just want to make sure my system will 100% stable. It did have that little cover on 4 of the 8 pins so it's got to be fine.
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a b V Motherboard
October 1, 2010 8:34:59 PM

It will be fine with just the 4 pins. While 8 pins would be better its not something you would notice.
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a c 235 V Motherboard
October 1, 2010 8:38:40 PM

Badge is correct... You'll be fine going with the 4-pin connector. The only issue you may run into is, when you try overclocking the i7-950 over the 4.0+ Ghz range, than the extra 4-pins might have come in handy for a stable overclock...

@Badge.... NO, I'm still not banned for recommending Elmer's Glue to apply the CPU. My deal with reynod/Nadine is still going strong. [:mousemonkey:5]
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a b V Motherboard
October 1, 2010 8:39:32 PM

An 8 pin 12v connector provides the same 12v power from the PSU as a 4 pin 12v connector just not as well grounded. 8 pin does not provide 'more' than 12volts, only a better grounded 12v source. If overclocking a quad or stressing the system out, a better grounded power source would provide stability.

Try using a power configurator like this.

http://www.antec.outervision.com/
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a b V Motherboard
October 1, 2010 8:42:35 PM

Techmo recommended a 16 pin 12v connector to the last guy. That was in addition to the Elmer's glue installation guide for the dual 8 pin connector. He has a CPU socket saw He uses too.
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November 21, 2010 10:29:29 AM

MSI X58; Same issue with 2x4 connector and 2 8 pin slots marked in book as jpwr2 and jpwr3. Each of these 2 8 pin sockets has a plastic insert covering 4 of the 8 holes. Since the cable was in a "Y" i plugged each into the 4 pin half of accessable plugs. Does that make sense?
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November 21, 2010 12:08:30 PM

i think you can get a 4 to 8 pin connector. same V but better ground :) 
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