Help plugging in power supply

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harusaledom

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Sep 29, 2016
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I have a Pegatron M2N7B-LA (Violet) motherboard. It has a 24 pin and a separate 4 pin for the cpu. Do I plug in only 20 pins from the power supply in the 24 pin connector and 4 pins for the cpu? Or do I plug in all 24 pins from the power supply and the 4 pin as well?

http://tinypic.com/r/54tw60/9

CPU: AMD Phenom X4 9750 2.4GHZ 95 Watts
MB: Pegatron M2N7B-LA (Violet)
Graphics: MSI R7 250
PSU: CX430
 
Solution
clutchc
I'm having trouble following your logic. Yes, you MUST use the separate 4-pin cable for the CPU header. It is wired different from the +4 pin section of the 24+4 pin cable. Just plug everything in like your picture shows, adding the left-over 4 pins as well for the 24 pin header.

History: Long ago, boards only had 20 pin headers in that location. As boards demanded more power, the extra 4 pins were added. That is why the PSU's cables always have the 24 pin cable separated into 20+4 pin. So it can be used on old and new boards alike.
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clutchc

clutchc

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Apr 22, 2009
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If your board has a 24 pin header, then naturally you will plug in the full 20+4 pin connector. It will work either way. The last 4 pins are just redundant +12V, +5V, and +3.3V wires.

There is a separate "beefier" 4 pin CPU cable for the motherboard's CPU power header. That one is just +12V wires.
 
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harusaledom

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Sep 29, 2016
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So would it be fine to plug in all 24 pins on the board and leave the other "beefier" 4 pin for the cpu connected as well or would that fry my cpu. Sorry new to this.
 
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Awesomlego

Awesomlego

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Jul 7, 2016
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Your PSU should have a 24-pin main motherboard connector. Plug all of the pins into your 24-pin socket on the mobo. Then, your PSU should have a 4+4 pin connector for CPU (if it's older, maybe just a 4-pin). Plug as many pins as you can into the socket close to the CPU. There might be 4-pins left over, just leave them there, nothing is wrong.
 
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clutchc

clutchc

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Apr 22, 2009
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I'm having trouble following your logic. Yes, you MUST use the separate 4-pin cable for the CPU header. It is wired different from the +4 pin section of the 24+4 pin cable. Just plug everything in like your picture shows, adding the left-over 4 pins as well for the 24 pin header.

History: Long ago, boards only had 20 pin headers in that location. As boards demanded more power, the extra 4 pins were added. That is why the PSU's cables always have the 24 pin cable separated into 20+4 pin. So it can be used on old and new boards alike.
 
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