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I'm a little confused about this board it has something called a JP20 Host clock Select Jumper, it has settings for 100/133/166/200 ok thats fine but then it also says this mobo is jumperless design and to set cpu freq through bios, well whats the story? do i set jumper at 166 for 333 cpu or do i leave it on 100 and set in bios sorta confusing. the board is A-Open AK77-600N with a Sempron 2400+, PC2700 ram, I'm going for 333fsb obviously.
 

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Hello,

JP20 is there for a couple of reasons, but mainly for overclocking. It can also be useful if the CPU you are installing is not recognized by the BIOS. If you leave the jumper the way it was when you bought it, the CPU will be auto-detected and set by the system board.

Hope that helps!

Shane
 

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Pinntech is right. And a lot of boards allow either overclocking by jumper or by cmos. So you have three things to be confused about. I have the best and most reliable results from using anything that says "auto". All those other jumpers and setting are for people that know how to overclock and are sure they have parts that are not locked to their rated speed (either by design or quality).
 
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