Tiger MP S2460 was [ot] Re: AMD testing

W Bauske wsb at paralleldata.com
Mon Nov 19 23:39:07 EST 2001


Well, I always scan my results for the min/max values and so far
they've been identical. Haven't actually subtracted the results
to see if it changed. I'm picking up a couple more boards and
should have them running next week. I can do more testing at that
point. It's a pain to swap cpus at the moment.

Are you sure you don't have a heat problem? What sort of case are
you using? Maybe you're heatsink/fan are insufficient for your 
particular chip? There are some very high volume fan/HS combos
available for Athlons. I'm using a 5400rpm fan/HS at the moment but
have a couple 8000rpm fan/HS available if needed. They're awful
noisy though and are a last resort.

Wes

Velocet wrote:
> 
> On Mon, Nov 19, 2001 at 09:28:01PM -0600, W Bauske's all...
> >
> > I must have gotten lucky. I built a test system, installed RH7.2 on it,
> > and it works fine. I only put 2 512MB ECC DIMM's in it though so perhaps that's
> > why I didn't have so much trouble. Also tried MP vs XP processors and both
> > perform identically with this board. It's the fastest Athlon system I've tested.
> >
> > Wes
> 
> Have you tested your computations for subtle errors on it, compared to
> with the MP processors? As said below there can be errors that
> are undetectable - how likely is this?
> 
> /kc
> 
> >
> > "Donald B. Kinghorn" wrote:
> > >
> > > ...
> > > We'll it won't blow up with a kaboom ... According to the Mushkin web site
> > > you can use 2 non-registered modules on the tiger 2460 ...
> > >
> > > Now, I'll give my opinion. This board is poorly enginered and has been a
> > > pain make suitable for scientific computing. I've had numerous memory
> > > problems with these boards and most of the problems don't show up as obvious
> > > crashes. They are the worst kind of errors -- corrupted results for large
> > > jobs --- the kind of thing you might not catch without carefull testing. I
> > > have found that I can not reliably use more than 3 memory modules (of any
> > > type) on these boards. If you need a 1GB configuration DON'T USE 4 256MB
> > > MODULES. Try 2 512MB or 2 256 and 1 512 module.
> > >
> > > I have a cluster running reliably with no detectable errors under any load
> > > (FINALLY) using the tiger 2460 with the 1.03 bios using 2 256 Crucial reg
> > > ecc modules and 1 Infenion (64x4) reg ecc 512MB module on each board. You
> > > need to ENABLE quick boot in the bios, use ECC SCRUB (maybe not essential),
> > > use a recent (>2.4.11) kernel with a stable vm, use an append  noapic in
> > > lilo and do NOT use any mem= appends in lilo. All of these steps may not be
> > > simultaneously needed but I am sick of fighting with this motherboard and
> > > this configuration seems to work reliably. (your milage may vary)
> > >
> > > I'm looking forward to seeing some better dual athlon boards come to the
> > > market. Does any one have any info on when this may happen?
> > >
> > > Best regards
> > > -Don
> > >
> > > >[i'm off list so please reply to me directly aswell as the list]
> > >
> > > >Has any user of the Tiger MP S2460 had experience of what happens if you
> > > >DON'T
> > > >use registered memory? Will it blow up :-) ??
> > >
> > > _______________________________________________
> > > Beowulf mailing list, Beowulf at beowulf.org
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> 
> --
> Ken Chase, math at velocet.ca  *  Velocet Communications Inc.  *  Toronto, CANADA
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