Axp-List Archive
Re: Benefits of Linux/Alpha over Linux/x86?

Subject: Re: Benefits of Linux/Alpha over Linux/x86?
From: W Bauske (wsb@paralleldata.com)
Date: Thu Jun 22 22:35:33 2000


Iwao MAKINO wrote:
>
>
> If you use dual CPU, you MUST fill 8 memory slot to get FULL performance.
> 667/4 is pretty good... 750/8 is even better
>

Do the math. If you have 4 SDRAM DIMM's, each 8 bytes wide,
that's a 32 byte wide data stream, also called 256bits. And,
clocked at 83.33MHZ, you get 2.6GB/sec, on a single bank. That
is what the board is spec'd at. The UP2K uses the same memory
architecture as an XP1000, near as I can tell. One can order
memory for an XP1000 and it runs perfectly fine in a UP2K.

Going to 8 DIMM's won't get you any more performance.

(I run both UP2K's and XP1000's)

Wes

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