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Article View: comp.sys.ibm.pc.hardware
Article #20632

Re: Different speed SIMMs causing slow down

#20632
From: Cameron Spitzer
Date: Thu, 14 Apr 1994 00:07
23 lines
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In article <1994Apr11.110710.1264@mnemosyne.cs.du.edu>,
Zhahai Stewart <zstewart@nyx10.cs.du.edu> wrote:
>boonlow@kits.sfu.ca (Boon Chong Benjamin Low) wrote:
>> He upgraded from 16mb to 32 mb and the system doesn't seem any faster,
 
>> Also, he has only 64kb of internal cache on the motherboard, would
>> upgrading to 256kb helps ?
>
>It might.  Some motherboards direct map the cache to a particular memory
>area - like the first 64K only caches the first 8/16 MB of main memory, so
>an additional 8/16MB runs uncached and slow.  I've heard of other cases
>where more memory runs slower for that reason.
 
Such motherboards should be sold as equipped with something other than
(less than!) a direct-mapped cache.  "Partially cached" or "fixed
mapped" perhaps.
What a crock.  If somebody sells you a board like that you should
return it and demand your money back.  And post here so we know where
the rip-offs are!
 

-- 
Cameron Spitzer, San Jose CA   cls@truffula.sj.ca.us
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From: cameron@rahul.net (Cameron Spitzer)
Subject: Re: Different speed SIMMs causing slow down
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Date: Thu, 14 Apr 1994 00:07:15 GMT
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