From: Ryan Hung (rwhung_at_interchange.ubc.ca)
Date: Wed Mar 03 1999 - 23:50:56 EST
> -----Original Message-----
> From: Vincent Poy [mailto:vince_at_mail.MCESTATE.COM]
> Sent: Wednesday, March 03, 1999 12:35 PM
> To: See K Lam
> Cc: Barry Marks; Paul Khoury; ThinkPad List
> Subject: Re: Should I upgrade to 80 MBytes on TP760ED?
>
>
> On Wed, 3 Mar 1999, See K Lam wrote:
>
> > On Wed, 3 Mar 1999, Vincent Poy wrote:
> >
> > > > I hope this helps.
> > >
> > > That's actually wrong... According to Intel engineers and I have
> > > tested this as well... If the cache controller chipset can
> only cache 64
> > > megs, then it will not cache any ram at all if you go past the limits.
> > > This can all be found on Intel's site.
> > >
> > is there anyway to test wheather any ram is cached or not? how
> > did u conduct the testing?
> > thanks.
>
> There is a easy way to do it... 64 megs is the way to benchmark
> the real world performance at. Then add memory, and see if the
> performance slows down. I use both Norton SystemInfo and Landmark Speed.
> Basically, all Pentium chipsets from Intel besides the HX can only cache
> 64 megs. The HX has a 512 meg limit. The PII Chipsets all can cache
> 512megs or even higher.
Alternatively, there is a program called Cache Check (either shareware or
freeware) that will run memory timings block by block on the RAM you have on
your system. That's what I used when I was previously doing memory upgrades
to 486's. It's at:
ftp://ftp.simtel.net/pub/simtelnet/msdos/sysinfo/cachchk7.zip
Ryan.
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