How long to clear cmos?

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26 Nov 2010
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How long to clear cmos?

Theory says 10 to 30 seconds. Manuals say similar. In practice, I've known 5 minutes on stubborn problems, even 2 hours on one board (But that was a rarity due to a busted m/b anyway). So, folks, what is your real world experience here? How long do you leave the short on and the battery out before you are convinced, truly certain it is cleared?

Reason I ask is because many newcomers, I suspect, trust the manual times stated and don't try for longer. Hence more returns than really necessary. Just a hunch, that's all.
 
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