Can I mix 266 and 400 DDR Memory?

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I have two 512 meg DDR Memory Modules.  They are both 512 meg as
mentioned and PC3200.  The thing is the new one I just bought was a
400 (What does this number mean, is it speed)? and the other seems to
be a 266 going by the label on the module. I want to put these both in
a new system I'm building but I'm concerned if they will work
properly.  Will it slow my system down or cause any reliability
problems?  If so maybe I'm better off with just the 512meg 400 or
either upgrading the other to a 400.

Re: Can I mix 266 and 400 DDR Memory?

Mixing the two would only increase your address space not the speed of
the ram as the entire ram bus has to be run at the same speed, so it
has to take the slower speed as not to cook the slower chip

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