On 5 Feb 99, at 1:04, James E. Griffin wrote:

> System is: mobo Matsonic TX-ProII w 1MB cache and sound; CPU pentium
> I 233 MMX; Diamond video card w 4MB RAM. Windows 98. Don't think the
> rest of system needed for problem diagnosis.
>
> Mobo has 3 dimm slots and 4 simm slots. Cannot use together dimm 1
> AND simm 1&2; or dimm 2 AND simm 3&4. Max RAM is 3 X 128MB SDRAM
> dimms. Board supports error correction RAM. Board is not pc100.
>
> Problem: System ran fine with 1 64MB SDRAM w EPROM module (Siemens,
> non-pc100). Went to add another 64MB SDRAM w EPROM module, couldn't
> get Siemens. IBM, Fujitsu, Matsonic, no go. Thought problem was
> mixing manufacturers. Pulled Siemens module, wouldn't run with
> Fujitsu 64MB SDRAM w EPROM module in dimm slot 1; same with several
> others. All high profile, low profile, didn't matter. Some didn't
> make into windows, some did but gave bogus VxD driver errors, etc. 1
> IBM module wouldn't run but another -- different chip layout -- would
> run. Tried to add identical IBM module SAME LOT NUMBER in dimm 2,
> system wouldn't run. None of these were error correcting modules.
>
> Thought at this time had a bad dimm slot 2. UNTIL we put 2 128MB
> SDRAM w EPROM modules in dimm slots 1&2 (both modules are pc100's).
> Module 1 Micron major on major. Module 2 Hyundai on Hyundai (!!).
> System ran fine. Swapped slots, still ran fine. Ran either module
> alone in dimm slot 1. System ran fine. Settled on 1 128MB Micron
> major on major w EPROM.
>
> Anyone out there got a reason, or is the God of slapstick rearing
> his head again?

  We've been using 128K SDRAM DIMMs for almost a year; before that, we
briefly flirted with 64K parts and never found ones we could rely on.
I would have hoped manufacturers had their acts together by now, but
maybe not.


David G

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