Hello, Roy.  We're talking about what I had written to Wayne Chirnside.

 JH>  here's what they had to say about that at the Crucial/Micron
 JH> website - -
  

 JH> "  If your PC has a 100MHz FSB, you can use PC100 or PC133 SDRAM.
 JH>  All PCs that accept PC100 SDRAM will also accept PC133 SDRAM;
 JH>  . . .." 

 JH> I still recommend you buy PC133, Wayne, for the above reason, even
 JH> though your current Celeron 433 system has 66MHz FSB I still say
 JH> the PC133 should work in there.

And the Crucial/Micron PC133 sticks and some others may still be
broadly compatible and work OK- - - but - - this stuff keeps chaging - -
Unlike what Crucial said, I first saw at PNY memory website today where
they say their PC133 sticks are no longer backward-compatible with
PC100. This is no doubt a CYA statement.  The problem has to do with the
higher density memory chips being used today. Mainboards with some of
the older chipsets simply cannot address the memory on some of the newer
high-density chips being used.

I had known about this potential problem last year, when I bought some
SDRAM sticks from a manufacturer who clearly stated that the sticks
would only work correctly on mainboards with certain chipsets. Since I
meant to put them on an Athlon/Duron board with VIA KT133 chipset, and
that chipset was included in their compatibility list, I went ahead
with my purchase.

When I advised Wayne, I was assuming that the mass-market office supply
stores would be selling only highly-compatible memory sticks, in order
to try and reduce potemtial customer returns due to incompatibility.
(After all, I think there are not that many boards out there which
can make full use of the PC133 speed).  And broad compatibility  may
still be the case, for what the chainstores are selling. I now recall
that I have recently seen some memory ads from the big chains where they
were charging more for PC100 than for PC133, and this chip density issue
may be behind that.

 RJT> Do you think that the stuff that's out there at these cheap prices
 RJT> would work in some of the stuff I have here?  I'm not even sure about
 RJT> the speeds,  got two boards up ATM w/ a K6-200 in one,  a P200 in the
 RJT> other.  Gotta dig out that other board out of "the pizza
box" and stick
 RJT> that 133 chip in it that I have around here someplace,  and find some
 RJT> ram to stick in it.

Sorry, I knew Wayne had a newer board with Celeron 433 in it.  I have no
experience with trying to put DIMMS in VX chipset boards as you have
there.  Please see also what I wrote about what Paul Williams had
posted about his older Pentium board with a DIMM socket.

 RJT> Anyhow,  there was one local guy who was trying to tell me I needed
 RJT> PC66 in these boards.  Comments?

Maybe you do need PC66.  I think first thing is to get on internet and
get ahold of manual for any of your board(s) which may accept DIMMS and
see what the mfgr says about it in there.

 RJT> Looks like I'm still not quite up to speed on some aspects of this
 RJT> stuff...

Heck, every time us searchers and learners get about up to speed,
there's a big bump in the road and things have changed.  Less than a
year ago, I bought a SOYO Dragon Plus mainboard with VIA KT266A chipset,
an Athlon 1.4GHz chip and some PC2100 DDR memory to go in it.  Now all
of that is about obsolete. :-(.

Good luck. - - -  JimH.

... Jim, I only got 2 parts of me getting bigger - earlobes and belly- Bubba
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