Hi Peter,
Thanks for clearing that up, I think.
I'm still 'haunted' by earlier stories (macintouch or
similar) or Ram going bad one month after
installation. Hard to understand how a firmware
upgrade would take so long to make its presence known.
I have yet to 'track down' the exact specs of the NEC
Dimms, but it would be interesting because the sales
people at the peecee store tracked them down using the
single 'Genesis' Dimm that was reading 256MB.
I suppose the true test is in a newer G3/G4 that needs
the 4.17/4.18 upgrade.
Cheers
George
--- [EMAIL PROTECTED] wrote:
>
> In a message dated 8/7/01 1:11:11 AM,
> [EMAIL PROTECTED] writes:
>
> <<
> This worked for me while waiting for the special
> delivery NEC Dimms. I was
> ready to settle for one compatible "Genesis" brand
> 256MB Dimm because the
> others were only reading 128MB.
> >>
>
> I, too, had a batch of purported 256 MB SDRAMs read
> only 128 MB, but on a
> Rev. 3 Beige MT.
>
> These proved to be "high density" 256 MB SDRAMs,
> with eight chips on one
> side. The board was apparently laid out for 16 total
> chips, eight on each
> side. Therefore, these were a half populated 512 MB
> SDRAMs (but was reading
> only 128 MB).
>
> The dealer replaced these SDRAMs with major brand
> 256 MB SDRAMs which I had
> previously purchased and found to be satisfactory,
> and all was well.
>
> Although the Beige machines are pretty tolerant of
> most SDRAMs, there are
> those which will appear to be half-populated, even
> though they are not.
>
> This same situation can exist on the earlier 5
> volt-only FPM-only machines
> (7200, 7300, 7500, 7600, 8500, 8600, 9500 and 9500),
> for which OWC and
> perhaps others have developed so-called "converted"
> DIMMs.
>
> These DIMMs utilize high-density chips, which the
> mobo cannot recognize, but
> incorporate special circuitry on the DIMM which
> makes the mobo accept the
> DIMMs as though these were populated with
> lower-density chips.
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