TYAN Transport TA26 (B2882) BIOS V3.03

David O'Brien obrien at freebsd.org
Tue Aug 2 17:34:55 GMT 2005

On Sun, Jul 31, 2005 at 11:37:09AM -0600, Ken Gunderson wrote:
> Just noticed this at Tyan's website dated 07/08/05:
> TYAN Transport TA26 (B2882)  BIOS V3.03:
> New features and Fixes :
> * Implemented AMD recommend for if 4 or more DDR400 DIMM's are used,
>   then the DDR speed is forced to DDR333 by default 
> Okay, it's the 4 or more DIMMS that caught my eye.  Especially since on
> a previous occassion they had specifically recommended Opteron 246 or
> faster for use with DDR400.  So now if I ugrade to the latest BIOS my
> 4x1GB sticks of DDR400 will be forced to run at DDR333 speeds.
> <vent>
> Fantastic!! Just what I always wanted.  AMD ROCKS!!  Market CPU's as
> supporting DDR400 then force us to run at DDR333 when you realize you
> screwed up!
> </vent>

I suspect these docs are overly terse and this applies to double-sided,
double-stacked DIMM's, which put twice the load on the memory data bus
and thus load the memory data bus beyond AMD's specification for
pre-revision E Opteron CPU's.

> And then there's the bank interleaving issue....

What is wrong with bank interleaving?

-- David  (obrien at FreeBSD.org)

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