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PC133 memory in Sony VAIO PCG-Z505LS?

Discussion in 'Electronic Repair' started by Sam Goldwasser, Feb 8, 2005.

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  1. Someone gave me a 256M module to try. It was recognized by the BIOS
    with 384M total (which would be correct), but Windows ME just kept
    rebooting.

    I know that Sony only supports up to 256M in this laptop but I've heard
    others claiming 384M. Or, is it a bus speed or standard issue that
    makes it either incompatible, or requires a change to the CMOS or BIOS
    upgrade?

    Thanks.

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
    Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
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  2. Most PC133 memory is 168 pin 32x4. I believe you need a 144 pin module
    16x8.
     
  3. Or for 256mb, PC 133 is 64x4...when you need PC100 32x8.
     
  4. Well, it fits physically and as I said, seems to pass power on boot
    diagnostics.

    Quite possible that the organization isn't compatible though.

    Thanks.

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
    Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
    +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
    | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

    Note: These links are hopefully temporary until we can sort out the excessive
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    Important: Anything sent to the email address in the message header above is
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  5. So it must be a 144 pin module. Does it have eight chips (double sided)
    or four?

    I agree that it is interesting that the memory is recognized by the
    BIOS. Did you try removing the existing 128MB module and replacing it
    with the 256MB module?
     
  6. 4 chips on each side.
    Unfortunately, that requires almost total disassembly of the laptop since
    it is on the *bottom* of the mainboard.

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
    Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
    +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
    | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

    Note: These links are hopefully temporary until we can sort out the excessive
    traffic on Repairfaq.org.

    Important: Anything sent to the email address in the message header above is
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  7. Ugh - I suppose the base memory may be soldered in, too, which would
    make swapping it out completely impractical.

    You can pick up a 128MB PC100 module for $35 plus $5 shipping if you
    really feel you need the upgrade. I'll note that for most uses Windows
    ME runs just fine on 128mb.

    http://www.memorysuppliers.com/mic12pc144pi1.html

    ..
     
  8. No, it's the same physical format and socketed but not worth the effort
    to get to it.
    I know. It's sort of a purity thing. I'd like it to be full. :)
    This memory was already available.

    Thanks.

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
    Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
    +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
    | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

    Note: These links are hopefully temporary until we can sort out the excessive
    traffic on Repairfaq.org.

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name is included in the subject line. Or, you can
    contact me via the Feedback Form in the FAQs.
     
  9. Oh yeah, I know about the 'sense of completeness' feeling <grin>.
     
  10. jakdedert

    jakdedert Guest

    Try slowing it (memory addressing) down a bit in BIOS and see if that
    works...or it 'could' be a bad stick. I've had memory test fine in POST,
    which totally screwed up in operation. In any case, obtain and flash the
    latest BIOS.

    jak
     
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