[ltp] Problem with trying to install a PC133 memory in IBM 600E

Bjørn Mork bjorn at mork.no
Wed Oct 10 10:29:45 CEST 2018

aprekates <aprekates at posteo.net> writes:

> Greetings to the list.
> i'm proud owner and user of a thinkpad  600E
> https://www.thinkwiki.org/wiki/Category:600E
> Unfortunately trying to upgrade its memory i bought
> a PC133 memory module. When its plugged in in either
> of one memory slots (even alone) (i've tested all possible
> setups with or without a companion old working pc66 module)
> and unfortunately the machine will just display the memory count
> and it kindof freezes. Even F1 to bios diagnostics wont work. In
> the spirit of the manual i'm in the 'No Beep Syptoms' category.
> So i guess the memory is faulty ? or i there are PC133 (newer?) types
> not compatible with my chipset.
> The diacritics of the memory's sticker:
> Samsung
> KR 0545
> M464S3254EUS-L7A
> PC133S-333-542
> 256MB Sync 133MHZ CL3
> On chip :
> K4S561632B-TL75
> I bought if from ebay

PC133 should normally not be a problem. That's only the max speed
rating.  It will work as PC66 in your laptop.  But the 600E has a 440BX
chipset according to https://www.thinkwiki.org/wiki/Intel_440BX , and
that puts some further restrictions on the modules.

Quoting from the "Densities" section at
https://arstechnica.com/civis/viewtopic.php?f=8&t=341021 :

 "The newer 32Mx4 and higher parts often seen in 256MB and 512MB DIMMs
  are not compatible."

I believe the module you have use such chips. Counting chips give you an
indication... As well as googling for the parts.

It might be easier to find a 256MB PC100 module than a PC133 module with
the correct low density chips.  A quick search on eBay shows that there
are a few of those available.  But I don't dare pointing at any specific
one, as I will NOT guarantee that any of them works....


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