Difference in memory model? Micron ending in 10EE4 vs. 10EB2

I need to upgrade my IBM Thinkpad 600X memory. I know Micron's
MT16LSDF3264HG-10EE4 will work. The person using it thinks any -10XXX
will work, but doesn't know why. I found some MT16LSDF3264HG-10EB2's.
What's the difference? Both chips are 256MB PC100 SODIMM SDRAM 144 pin.
(The 10EB2 does have 8 chips per side - meaning low density - which
seems to be important for the 600X.)

kylie.g@mailinator.com wrote:
> I need to upgrade my IBM Thinkpad 600X memory. I know Micron's
> MT16LSDF3264HG-10EE4 will work. The person using it thinks any -10XXX
> will work, but doesn't know why. I found some MT16LSDF3264HG-10EB2's.
> What's the difference? Both chips are 256MB PC100 SODIMM SDRAM 144 pin.
> (The 10EB2 does have 8 chips per side - meaning low density - which
> seems to be important for the 600X.)
>

See page 2.
http://download.micron.com/pdf/datas...32_64x64HG.pdf

H versus L - high versus low power
G versus Y - standard versus lead-free (ROHS)
-10 versus -13 - speed, 100MHz or 133MHz
E versus 3 - E=CAS2, 3=CAS3, a.k.a CAS Latency or CL
Last two char. - Silicon die revision, PCB revision

The 10E parts would be 100MHz CAS2. If you were to mix a
103 part in there, that would be 100MHz CAS3, and all RAM
would be run at the slower CAS3 setting. So if you have
to run at 100MHz, then CAS2 is the way to go. I doubt the
silicon die or PCB revision mean anything to a consumer,
unless you were an overclocker or something.

Also, if I check here, the Thinkpad 600X listed on the Crucial
site, calls for 133MHz memory. Make sure you are hunting
for the correct memory. You have to know a fair amount
about the hardware in there, to know what options are
available to you, and desktop machines are a lot easier to
dig up that info, than laptop/notebook computers. I cannot
guess at the reasons why there is 100MHz memory in your
machine now, if indeed that is what is in there. Maybe
it was there from day one ?

http://www.crucial.com/store/listpar...28Type+2645%29

Paul