clk_sw - majorly confused!

Hi,

I am building my own PC for the first time and have found it relatively simple apart from one thing, the setting on the motherboard for “CLK_SW”.

I have the Gigabyte GA-700N400 Pro2 motherboard, 400FSB, and am using an athlon xp 3200+ socket A processor.

There are two possible settings for the “CLK_SW” but im baffled as to which one to use - in the manual it reads like this…

[color=red]Default Setting : OFF[/color]
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[color=#ff0000]ON = AUTO (Supports FSB 400/333/266 Mhz CPU)[/color]
[color=#ff0000]OFF = 100Mhz (Fix FSB 200 Mhz CPU)[/color]
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… my thought is that it would be set to “ON = AUTO” as its 400FSB but someone said that having ddr ram would mean its 200 Mhz, Also why would they have a relitevely new motherboard have the default setting as what i can see as a lower spec?

Hope someone can help and explain this to me.

Help much appreciated, thanks, Chris.
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