12v ATX Power Connector

Ive just modded my new power supply to fit my bespoke case, but the ATX 12v power connector(4pin) has a fault.
when connected it causes nasty noices through the speaker system like its got a break in the wires from the PSU to the connector on the board.
The question is......
I havent got it connect at the mo, the pc is running ok so do i need to use it??????
JAs
K7N2 Delta ILSR
2500XP Barton
512 Twinmos dual channel
Tyan 9600Pro
2x Diamondmax plus9 120GB HDs (sata)
cd-r/dvd combo
2 case fans
neon lite
PS cant take the PSU back its got no case anymore

the 20 pin atx has 5x 5v feeds but only 1x 12v
this is because in the past 5v feed the vga card and the cpu
now modern vga cards lie yours feed of the 12v as does the cpu
now a pin on the atx moules i rated to 6a max giving 72 watts max
many amd cpu pull that on their own
this is why these and other boards have the extra 2x 12v feeds

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    I am a volunteer. I am not an HP employee.
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