Fit memory in matching pairs?

  thewasp 15:56 05 Jan 2007

I've been offered a 256mb sodimm module to add to my existing one to double my laptop's memory.

They are both Hynix chips and look identical but one is pc4200/533mhz the other pc5300/667mhz.

Would this be detrimental or should I fit exact pairs?

  James. 16:00 05 Jan 2007

Should be okay, but both will run only at the lower speed ie PC4200/533mhz.

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