Re: [Thinkpad] X Series again

After re-reading tawbook and tabook, they say memory speed is limited to
266MHz or PC2100. But some models come with PC2700. I would imagine this
is because PC2700 is often cheaper than PC2100 due to market realities.

Also, all (11 models of) X30's use PC133 memory, while all X31's (39 of
them so far) max out at PC2100 speeds, which is really only twice as fast.
(Again, all according to the books.)

133 MHz * 8 bytes per transfer comes to 1064MB/s.
PC2100 is DDR 133 or 133 * 2 * 8 or 2128MB/s.

I think I've got it straight now, and I'm bummed that I can't justify the
cost for the 2672-RHU right now. (802.11 a/b/g, bluetooth, gigabit
ethernet, 40GB 5400RPM drive, 1.6GHz Pentium M, 512MB RAM and 3 year
warranty. Drool.)

Chris

On Mon, 5 Jan 2004, Bill - ThinkPads dot Com wrote:

> i have not verified your commments IRT some X31 coming with PC2100 memory..
> all centrino/banias thinkpads SHOULD use and come with PC2700 memory..
> you CAN use PC2100 memory but then, per ibm, all the memory, whether PC2700
> or PC2100 will operate at the slower speed..
>
> you can use PC2700 memory in a PC2100 thinkpad (X30?) but it will obviously
> not give you faster operation..
> it will allow you to buy new memory for your X30 that, when you upgrade to
> an X31, you can install in the X31..
>
> was all that clear..? :-)
>
> *******************
> Cordially,
> Bill Morrow
> (from NetFinity Server)
> web page: http://www.thinkpads.com
> bill@thinkpads.com
> ----- Original Message -----
> From: "Chris Schumann" <cschumann@twp-llc.com>
> To: "thinkpad" <thinkpad@stderr.org>
> Sent: Monday, January 05, 2004 11:03 AM
> Subject: [Thinkpad] X Series again
>
>
> > I remember what I was going to ask before.
> >
> > Some of the X31's IBM has offered come with PC2100 memory and some come
> > with PC2700 memory, even though the machines have the same chipset.
> >
> > Has anyone done benchmarks to ensure there is a real memory bandwidth
> > improvement when using PC2700 memory?
> >
> > I'm guessing (hoping) all X31's will use PC2700 at full speed (if not
> > mixed with another speed). If you think differently, let me know.
> >
> > Thanks,
> > Chris

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Received on Mon Jan 5 12:10:11 2004