It is true.  All ATX grounds are tied to one point in the power supply.

Charles Linquist

Dave Lag wrote:
> John Pearson wrote:
> 
>> I want to convert my Dell ATX power supply to the standard power plug 
>> pinout. So I need to add the 3.3 volt lines to the main plug. I 
>> noticed that the 3.3volt lines have their own ground.
>>
>> Does anyone know what pin on the standard ATX power plug is the ground 
>> for the 3.3 volt lines?
>>
>> Thanks
>>
>> John
> 
> 
> I suspect the grounds are all common- meter the dell PSU to see if they 
> are?
> 


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