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Subject: Re: DDR SDRAM Question

Author: Dan Andersson

Date: 11:45:55 03/29/01

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According to SPEC there is almost no speed difference between DDR2100 and PC133
SDRAM, a 157 second run compared to a 158 second run. But that was on a AMD 1.2
GHz processor. While we are on it be certain that it is PC2100 SDRAM and not the
slower PC1600 SDRAM. The reason that the faster memory might not be a win is
that the speed of RAM can be measured in quite a few ways. PCXXXX RAM is
speedier than PC133 RAM in reading data in a stream i.e. a lot of data that lies
after each other in memory and then transferring it, think graphics/video and
sound. But another kind of speed is the time it takes to find and send one or a
few words, chess positions and messages. Memory that is fast at finding and
transferring data both, are in general very expensive. As for your other
question, yes doubling a transposition table should speed up a search, my rule
of thumb is 5% speed increase (almost nothing ratingwise) per doubling as long
as I have enough RAM to hold the table.

Reagrds Dan Andersson

• Re: DDR SDRAM Question Vincent Diepeveen 05:26:31 03/30/01
  • Re: DDR SDRAM Question Dan Andersson 06:42:05 03/30/01
    • Re: DDR SDRAM Question Vincent Diepeveen 14:06:19 03/30/01
    • Re: More Info on DDR SDRAM Stephen Ham 08:01:10 03/30/01
      • Re: More Info on DDR SDRAM Dan Andersson 08:26:06 03/30/01
        • Re: More Info on DDR SDRAM Vincent Diepeveen 14:13:04 03/30/01

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