Re: SO-DIMM Ram backwards compatability!

On Sat, 25 Feb 2006 03:29:40 -0500, markimaro
<markimaro.23s21z@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:


Hi,
I am thinking about upgrading my laptop rams which my motherboard
seems to support PC2100 as specified by the manual.
It currently has 2x256 PC2100 DDR266 Rams ( 512mb in total).
Is it possible to use PC2700 rams? Or it just wouldn't work with my
system?
Are all SODIMM rams backward compatability?
So that If I end up purchasing a 1 Gig PC2700 DDR333 Ram, would it
drop back down to the speed of PC2100? If so, I wouldn't mind that
happening, just as long as I get more memory.
Or it just wouldn't function at all.

I faced the same situation a few weeks ago: I had one Thinkpad which needed
PC2100 and two which needed PC2700. The Crucial model lookup showed
exactly that. Since the one which needed the PC2100 is already at what I
figure is at about half-way through its lifecycle, I decided to get PC2700
for it, hoping it'd work OK with it and if that system craps out for some
other reason, the extra memory can be transferred to a newer system. It
did work just fine, so yes, as expected, the SO-DIMM is backwards
compatible... and of course, in that system, the PC2700 works at the PC2100
speed, as you mention.

--
Rgds, George Macdonald
.