KT2 COMBO, Is 12v power Connector Needed?

Just Bought a "KT2 COMBO" to upgrade mi good old 6330 lite, and add some 2100 DDR Ram, and a new xp processor ( 2000+ ).
The problem is I'm using the same case, and the power supply in it has no 12 V ATX Power connector.
In the Quick User Guide, it refers to it (p 2-9), saying it's to provide power to the CPU.
Would the system work ok if I use only the main power connector?
Has anyone tried using it this way?  

If you don't have stability problems it's probably fine.
You can buy an adapter to allow you to convert a mulex ( like you plug into an HDD ) to the 4 pin 12V plug.
If you don't have one you might try looking in local shops for butn out PSUs that have them, cut the wire and solder it to your PSU's output ( yellow to yellow, black to black )

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