Problems with AMD64 and 8 GB RAM?

Willem Jan Withagen wjw at
Tue Apr 5 04:24:18 PDT 2005

Greg 'groggy' Lehey wrote:
> I've recently acquired an AMD64 box (dual Opteron 242, SiS Master at -FAR
> motherboard
> (
> See below for more details).  I find it very unstable running with 8
> GB memory, though 4 GB are not a problem.  At first I thought it was
> the onboard peripherals, but after disabling them it still persisted.
> What's unstable?  I only once got it through the boot process.
> Running a 5.3-RELEASE i386 kernel it panics, though I haven't

> 1.  Has anybody else seen this problem?
> 2.  Has anybody else used this hardware configuration and *not* seen
>     this problem?

[Posted something like thisearlier, but did not see it on the list]

Little late to the discussion, but none the less.

I bought this board over a year ago to run amd64 (you're running i386).
But in the end I trashed it for running amd64 since one of then involved
developers also tried to use the board without much success.
It was running fine with amd64, 1 CPU, 2Gb, but as soon as I added the
2nd CPU the slightest load crashed the system somewhere in IPI-areas.
After long discussions I came to the point that it was easier to get a new 
motherboard, so I got a Tyan Tiger S275. Which as not yet failed on me.

So if ever you'd like to run amd64 on this system, even now you've determined
the problem to be the load on the memory-bus, be warned that odd things could
be happening.


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