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Subject: Re: Building dual opteron for DS9 – memory configuration question

Author: Nigel Edwards

Date: 00:03:03 02/23/05

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On February 22, 2005 at 15:18:06, Dan Andersson wrote:

> I think the Tyan S2895 motherboard has a Dedicated Memory Bus instead of a
>Shared Memory Bus. So you need two sticks per processor to use it fully. Then
>you get the low latency with the full bandwidth.
>
>MvH Dan Andersson

Thank you. The manual dictates two sticks in pairs per processor, as you
suggest, for NUMA support. However for 64 bit operation the manual shows only 2
sticks in total, one for each processor, or both on the same processor but not
paired.

That leaves me with the dilemma of which way to go - 4 x 512mb or 2 x 1gb
sticks. An earlier message on this board, I think from Vincent Diepeveen, has
suggested a strong preference for 64 bit over 128 bit memory configuration for
chess engines. Does this advice still hold good for DS9 on a modern motherboard?



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