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?

have u tried praying to god ?

Btw, not pros on handling laptop probs but i learn a bit frm it...like desktop...nway....

(1) better stick to current clock for ur memory, even u CAN installed 800Mhz...ur pc/laptop can only run at 667Mhz...UNLESS u know how to OC/tweak ur pc/laptop

(2) Is it necessary to plug 2 ram into the slot? I dun think so....

(3) If ur laptop can only upgrade till 2G max....then it will show till 2G lor....

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

Repeated offense from you will result in warning/suspension.

Have you tried to plug the 800MHz one into another laptop? Maybe that module is faulty?

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

normally it's backward compatible.. mean can be used..
if the platform not support.. it's just reduce the speed accordingly..

what proc n mobo chipset btw?

Well, I think it shows 667MHz because you mixed with a 667MHz ram. When you mix with different RAMs, it'll always adjust to match the slowest one.

my laptop also run 667 only but i plug in 800 it auto show both is 677 and running without any problem

Some ppl just dont have a sense a humor anymore.

If you use only the 800mhz ram and there is no display, then the motherboard does not support 800mhz ram. If you mix and it works, then there is a possibility the rams are running with the lower 667mhz ones. But the biggest problem you should realize is this. One of the rams will fail. I have seen this many times since PC100/133 days. Even some DDR266/400 matchings can cause either one to fail. I remember it was caused by voltage issue, even though there is no overclocking. The symptoms are overheating ram cards.

first of all,does ur laptop support 800mhz ram?
if ur laptop doesn't,,then u cant install 800mhz ram.
stick to 667mhz lor..

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Added on December 15, 2009, 11:01 pmsecond,if ur laptop support 800mhz ram and u have a 667mhz ram in one of the slot.
if u install 800mhz ram,,it'll only run in 667mhz because the speed is automatically changed due to the another 667mhz ram installed.
which means,,the speed will be 667mhz only.

This post has been edited by UnknownH: Dec 15 2009, 11:01 PM

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

if u just install the 800 ram only did it work
did u update ur bios