Power supply needed for MS-7220 (Diamond Plus) and others.

 
The following statement is taken form the K8B Diamond Plus Manual.
For ATX 12V power connection, it should be greater than 18A.
If I am interpreting correctly, the ATX 12V connector should have dedicated to it a minimum of 18A.
My first, question is if the Power Supply has two or more rails, how do you know the power dedicated to the ATX 12 connector on the Power Supply?
Second, if a +12V rail is not dedicated the connector, how do you know what is connected to each rail of the Power Supply?
This maybe the source of why many are saying, they have more stable system performance when using single rail Power Supplies.
I have tried eleven different manufactures to get more detailed Power Supply specifications, but no responses; today through February 1st is the Chinese New Year.
Those of you running the K8B Diamond Plus, what are you using for Power Supplies and are you having any instability problem?
One thing I did find curious was that going the manuals and in most all of the newer Socket 939 motherboards have this specification, but nothing in the motherboards specifications of on the MSI Web Site about this required and the are a lot of 500-600 Watt power supplies sold that do not meet this specification.
The statement Total Wattage does not mean a thing has even more meaning to me now.
Are we going to have to know the Current Rating of each cable on the output of a Power Supply now to insure we are purchasing the correct Power Supply?
Roger

Roger
Ihave a Tagan 580w U22 with switchable dual/combined +12v rails and it is very stable,set it combined for 35a.
Only thing to ponder was the 4/8 pin +12v/p4 connector,power supply has the correct split 2x4pin connectors so does the board but there is a little removable cover over 4 pins,so thinking MSI fitted it there for a reason I have fitted only one 4 pin connector,no problems as yet.
Think you may well have a point re the 18a.
I have just given my son my old sli platinum/cpu/heatsink/ram/vga card,this setup ran  250/11/4 @ 1.4v & ram 2.5 3 3 7 1.1 @ 2.75v with the Tagan.this setup now fitted in his case but with a dual 18a rail Enermax and he can't o/c stable to the old settings.Case has better cooling than the wavemaster it all came from.
Dont think the enermax is bad just that it supplies the power a different way.
Regards
Rossoevo

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