My laptop is running 667Mhz 1G ram but when I change to 800Mhz 2G ram it doesn't run at all .
I need to plug the 2 stick ram to make my laptop operating again , some more it just only show 2G available memory.
Anyone can help pls and really in need of help here .
Is it that those laptop which is running on 533/667 Mhz ram are not applicable to run on 800Mhz ram?

If praying to god do help it, than I no need to ask for help in this forum.....

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Added on December 15, 2009, 1:41 pmTQ.... for the feedback.

BTW how do I know what is the max that I can go for.....??? Anyway to check it...????
I plug 2 ram into the slot was for testing.... as when I plug the 800 into it does not work than I tried plug in back the 667 wtout the 800 it works fine.
So I plug in both and see whether it works or not.
Does it means that the 800Mhz ram is not working fine????

This post has been edited by driots: Dec 15 2009, 01:41 PM

Just tried on Dell Latitude D630 which have build in ram of 1GB 667Mhz.
When I plug-in the 800Mhz it does operating and it shows 3GB but under 667Mhz and not 800Mhz.
Does it consider that the ram is not defective????

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Added on December 15, 2009, 3:43 pmBTW I'm using Asus F5RL series Laptop.
Could it be the model does not support 800Mhz ram????

This post has been edited by driots: Dec 15 2009, 03:43 PM

Thanks guys for all ur advise.....
Need to stick back to 667Mhz ram now.
Really appreciate all ur help......
Thanks again.....