Re: [Thinkpad] CPU Upgrade for 770Z - Anyone Tried PIII 500MHz after Switching 64MB Onboard Memory to 100MHz?

I was the one who originally wondered it we could replace the "hidden" DIMM
with a 100 Mhz part, making the entire FSB 100 Mhz, and then use a P3 500
CPU
I would be VERY curious. I am pretty sure you will need to pull that bottom
memory chip, it is most likely 66 Mhz
----- Original Message -----
From: "Philip Kiff" <pkiff@sympatico.ca>
To: <thinkpad@stderr.org>
Cc: "Brian Hougaard Baldersbaek" <brian.h.baldersbaek@stofanet.dk>;
<scosgt@worldnet.att.net>
Sent: Wednesday, September 03, 2003 11:36 AM
Subject: RE: [Thinkpad] CPU Upgrade for 770Z - Anyone Tried PIII 500MHz
after Switching 64MB Onboard Memory to 100MHz?

> Brian:
>
> I'm planning on attempting the CPU upgrade if I don't hear any clear
> confirmation of multiple failed attempts from the list. I haven't done
alot
> of this kind of work before, but I did manage to upgrade my 770E CPU
> successfully, so as long as I go slow and careful I think I can probably
> perform the 770Z CPU swap as well...although I think there will be a whole
> additional level of dissassembly to get to that motherboard memory slot.
> I'll be sure to keep the list updated on my progress, but if my attempts
> aren't successful, then I don't think it will really "confirm" that it
can't
> be done, since I don't have the experience necessary to ensure that
> everything gets done correctly (nor am I entirely confident about avoiding
> damage to my motherboard in this experiment :-o ).
>
> For the procedure, I've ordered an IBM branded 64MB 100MHz SO-DIMM and a
> PIII 500MHz MMC-2 pulled from an ThinkPad 600X which I think is non-speed
> step enabled (the CPU part number begins "PML...", instead of "PMM...").
> I'm going to try the install initially without any other SO-DIMM modules
> added, and just see if I can get the base system to work. But I probably
> won't get around to it for a week or two.
>
> I don't know much about the memory capacity stuff you're talking about,
> although the BIOS I think is involved somehow in the 512MB limit that some
> folk have run in to. Eventually, I'll be trying to get the system up to
> 512MB using two 256MB modules in the regular SO-DIMM slots if I can. I've
> also seen references to people having difficulty getting "two bank" memory
> fully recognized in certain slots. How exactly do you tell if a 256MB
> module is "one bank" or "two bank"? The ones I'm looking into buying
right
> now are Infineon branded with a "32x64" chip configuration, broken down as
> "eight CMOS 16MX16 bit with 4 Internal Banks". It looks to me like
> physically the module has 4 chips on each side (8 in total). Does anyone
> know if this ("4 Internal Bank") module is a "one bank" 256MB module?
Will
> it matter?
>
> Regarding the 770Z CPU upgrade theories, just to be clear, these weren't
my
> theories, I just read about them here and posted a summary.
>
> Phil.
>
> -----Original Message-----
> From: thinkpad-admin@stderr.org [mailto:thinkpad-admin@stderr.org]On
> Behalf Of Brian Hougaard Baldersbaek
> Sent: September 3, 2003 05:19
> To: pkiff@sympatico.ca
> Cc: thinkpad@stderr.org
> Subject: Re: [Thinkpad] CPU Upgrade for 770Z - Anyone Tried PIII 500MHz
> after Switching 64MB Onboard Memory to 100MHz?
>
>
> Hi Philip.
>
> Your thoughts about the ThinkPad 770Z, swapping the MMC-2 form factor
> PII-366Mhz (66 MHz FSB) and the "onboard" 64 MB PC66 RAM-module with a
> non-speedstep PIII-500 MHz and a 128 MB PC100 RAM-module....I found...and
> find...very interesting. Very !
>
> I too...saw the suggestions regarding this.....and I too must ask: "What
> were the results ?"
>
> I have had my own thoughts.
> I haven't succeeded in finding out, how much memory the 770Z can be
stuffed
> with.
>
> What until now have been tried with some sort of success, is putting in,
two
> 256MB PC100 modules.
> Reports say, however, that the onboard 64MB PC66 module then, is being
> swapped out.
>
> Since the 440BX can see up to 256MB in each of the 4 memorybanks, it
should
> be possible to put in 1GB of RAM.
> The 770Z has all 4 memorybanks.
> The onboard memoryslot being #1.
> One of the free slots being #2 and #3.
> The other slot is #4.
>
> A lot of good folks have had problems in upgrading memory in the 770Z.
> One is, putting in a two-bank memory module in the one-bank memoryslot.
> Therefore they discovered, that only half of the memory module is being
> recoqnized.
>
> Now. If it's possible to get my hands in both one-bank and two-banks 256MB
> PC100 modules, my theory is, that putting them in the right places, the
770Z
> will recoqnize all 1024 MB's of RAM.
> But no one has ever tried this. All attemps stopped, with putting in two
256
> MB modules.
>
> With your brilliant theories in conjunction with this....a full-stuffed
> ThinkPad 770Z would look like this.
>
> CPU: PIII-500 MHz, Non speed-step.
> FSB: 100 MHz.
> RAM: 1024 MB.
>
> Who have the ability to try these experiments out ?
>
> Sincerely
> Brian
>
>
>
>
>
> _______________________________________________
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>

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Received on Wed Sep 3 11:47:51 2003