🚀 go-pugleaf

In article <1993Jan11.161910.26095@zeos.com> jre@zeos.com (Jim Erickson) writes:
>If the SIMMs are too slow for the machine they will: 1)work without any
>problems or 2)produce errors ranging from GPFs to parity errors either all of
>the time or intermitantly.  

Or they may work fine for a while and then go bad.  I had this happen
once.  My first computer (an 8MHz XT clone) had 640K of 150ns DRAM.
When I upgraded the motherboard to a 10MHz 286, I transferred the RAM
chips.  Bad move.  It worked fine for a while (about 4 months), after
which I began getting more and more parity errors and general system
lockups.  When I put the RAM back in the XT, it developed the same
problems.

Overdriving RAM can wear it out, making it useless on the machines it
was originally designed for.

Anyhow, when I put 100ns chips in the 286, all the problems
disappeared.  It still froze occasionally, but I'm sure that was
static damage to some chip somewhere.

Anyway, when I got my 25MHz 386 motherboard, I made very certain that
the RAM was the proper speed for it.  I got 70ns SIMMs for it, and
never had a problem.
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