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PSU pins?


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6 replies to this topic

#1 XPabuser

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Posted 21 November 2012 - 12:50 AM

Can someone tell me why some PSUs have 20pins and some have 20pins+4pins??

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#2 scurvychef

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Posted 21 November 2012 - 04:03 AM

Depends on the board you are plugging it into.

#3 XPabuser

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Posted 21 November 2012 - 04:48 AM

My motherbaord has a 20pin socket. The PSU has a 20pin plug AND a extra 'auxillary' 4pin plug.

#4 hamluis

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Posted 21 November 2012 - 02:13 PM

Actually...it reflects the age of the PSU.

20-pin PSUs used to be the standard...until the advent of 24-pin PSUs.

Either will normally power a system, the 4 additional pins are for PCIe devices requiring powering.

Louis

#5 XPabuser

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Posted 21 November 2012 - 10:38 PM

Actually...it reflects the age of the PSU.

20-pin PSUs used to be the standard...until the advent of 24-pin PSUs.

Either will normally power a system, the 4 additional pins are for PCIe devices requiring powering.

Louis


Thanks for that.

Now what does it mean when you turn the comp on and it doesnt goto POST it just sits there with fans turning
and the red and green lights continuously on and the monitor wont turn on??

#6 hamluis

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Posted 22 November 2012 - 12:39 PM

Well...the fans turn so the PSU is functioning somewhat, if not optimally.

No visible signs of life onscreen...may mean that your video input/output if fouled up or dead. You haven't provided any info re the system or its components...but my conclusion would be that video/insput is the problem until proven otherwise.

Louis

#7 dc3

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Posted 22 November 2012 - 02:56 PM

Here is the difference in the pinout between the 20 pin and the 24 pin connectors.

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