On Sun, May 16, 1999 at 05:22:59PM -0700, Mersenne Digest wrote:
> Date: Sun, 16 May 1999 16:57:08 -0700
> From: Kevin Sexton <[EMAIL PROTECTED]>
>
> Anybody know which chipsets have the memory caching problems, or who can
> point me in the direction to find this information?
Intel chipsetted Pentium boards are the chief offenders: the FX, VX and TX
all being unable to cache more than 64MB. Some HX boards can cache up to
512MB by default, others require additional tag RAM to cache above 64MB.
Some HX boards (like mine) don't have a socket for inserting tag RAM :-(
If you have one of the more recent Socket7/Super7 chipsets from SiS or VIA,
I believe they'll happily cache up to 256MB or 512MB. Pentium IIs are fine
up to 512MB IIRC, so it'll probably be a year or two before that becomes a
problem for significant numbers of people.
I've just put my P200MMX system up from 64MB to 160MB and find the impact
on GIMPs performance under Linux to be at about the 2% level, which I can
live with. To be fair I am doing double checking on this machine - the
performance drop may be greater for exponents in the 7-8 million range than
for those around 3 million.
> I am interested in finding out whether to add memory to a VXPro board,
> currently has 32MB, AMD K-6 200. I know this is not strictly on topic,
> but it might increase performance of prime95, especially if another app
> hogs the memory I have now.
It's probably worth it - 32MB is not a lot these days ;-)
--
-------------------- Robin Stevens <[EMAIL PROTECTED]> --------------------
Merton College, Oxford OX1 4JD, UK http://www-astro.physics.ox.ac.uk/~rejs/
(+44) (0)1865: 726796 (home) 273337 (work) 273390 (fax) Pager: 0839 629682
"He's dead Jim." "I know, Bones. I've seen the script"
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