on 04/06/2004 12:02 PM, John Niven at [EMAIL PROTECTED] wrote:
>
> On Monday, April 5, 2004, at 10:51 PM, Michael wrote:
>> What kind of RAM? Your best bet is 8 chips on each stick, not 2, 4
>> or 9.
>Theoretically, they don't HAVE to be the same speed
> (some could be faster), but its nice if they are.
My IIsi will not work all day without having a bomb unless the RAM is the
same speed on all sticks. But that may be due to the ROM stick that is in
it.
>
> Non-parity 30 pin SIMMS come with either eight "by 1" DRAM, or two "by
> 4" DRAM. There is no technical reason why one should be preferred over
> the other, in fact the two "by 4"'s would be newer technology.
Some older software/programs and a few screen savers will freeze up with
the new tech sticks. I have tried them all, the old 8 chip sticks work the
best, on this old horse.
Been There and Done This Dance Before, a Long Time Ago.
>
> Quality of manufacture of DRAMs is another thing. I prefer American
> (Texas Instruments or Micron), Japanese (Fujitsu, Hitachi) or finally
> Korean (Samsung).
I Will agree with you here.
>
> Non-parity (meaning the SIMM inputs and outputs 8 bits at a time) are
> the type required for Macs. Parity SIMMs usually come from old PC's
> and input and output 9 bits at a time. So these have nine "by 1" DRAM,
> or two "by 4" DRAM and a single "by 1" DRAM. They also work fine in
> Macs because the ninth bit is not connected to the bus. However, I
> usually remove the offending DRAM (by wire snips and de-soldering) as
> it saves a little power.
Now this is my kind of 'Learn Something New Every Day'. Is there more
about this somewhere. Please. :-] I've got a 'few pounds' of nine chip
sticks.
Michael
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