On Oct 14, 3:19*am, Paul wrote:
Daave wrote:
I have an HP Pavilion ze5700 notebook with a whopping 256 MB RAM (and
onboard video)!

Yes, HP for some reason thought this was enough RAM to run Windows XP!

I'd like to add more RAM. I see no reason why I can't add 512 MB.

However, I'm a bit confused. Please compare these two modules:

http://www.crucial.com/store/mpartsp...52D384A5CA7304

and

http://www.crucial.com/store/mpartsp...EC39EBA5CA7304

Other than the $15 price difference, it's hard to see what else is
different. One is for a Pavilion and the other is for a Presario. But
the only other difference I see is that the Presario one says "64Meg X
64." What does that mean? Is there a real difference?

The difference between the products, is these two lines.

* * "Each memory slot can hold DDR PC2700 with a maximum of 512MB per slot"

* * "Each memory slot can hold DDR PC2700 with a maximum of 1GB per slot"

One computer supports a different chip density than the other.

*******

The module manufacturers try not to give away density information.
If they spec a custom module for a computer, there is never a
datasheet. If they sell "generic" modules, where the customer
takes the risk, they're willing to give datasheets for those.
But then, you can't be sure they'll work (or whether they'll be
"half-detected).

http://www.valueram.com/datasheets/d...#DDR%20SODIMMs

As for "dimensional" descriptors, 64M x 64 doesn't tell me anything
(other than you're getting a 512MB module). If you told me the
composition was "sixteen 32M x 8-bit chips), then you'd be
telling me something. Memory comes in 64 bit wide arrays, so in
that specification, I'd need eight 32Mx8 chips laid side by
side, to make a 64 bit wide array. I could put an array
on both sides of the module, making a dual rank unbuffered
SODIMM. So (16) 32Mx8 is a fairly full description, while
64M x 64 is meaningless (because they likely already told
you the module was 512MB). I can tell the (16) 32Mx8 is
a dual rank module, which might be important to me
(bus loading).

http://www.valueram.com/datasheets/K...64SC25_512.pdf

* * Paul- Hide quoted text -

- Show quoted text -

Thanks, Paul.

I just finished a chat session with someone from Crucial. This is what
she said:

"The Pavilion ze5700 Series must have 16 chip, low density installed."

So, I guess I'll get the more expensive kind.

But I wonder what would happen (hypothetically) if I installed the
other (higher density) module instead.