DUAL CPU board vs 2 Single CPU boards: bang for buck?
fraser5 at cox.net
Thu Mar 7 09:45:26 PST 2002
Amazing. 1 cpu 63 ps/day, 2 cpu = 179 ps/day, sounds like a case of 1 + 1 =
2.84 (ie. 63 + 63 = 179 (not 126)?)
Sounds fishy to me but I am unfamiliar with your application.
From: beowulf-admin at beowulf.org [mailto:beowulf-admin at beowulf.org]On
Behalf Of Velocet
Sent: Thursday, March 07, 2002 11:00 AM
To: beowulf at beowulf.org
Subject: Re: DUAL CPU board vs 2 Single CPU boards: bang for buck?
On Thu, Mar 07, 2002 at 07:24:08AM -0500, Jim Fraser's all...
> I don't desire to start a flame but it seems to me that for computational
> intensive and memory intensive work that 2 singles are better and in most
> cases cheaper then a dual setup. The dual SMP systems out there now have
> fight for bandwidth along the same bus. The AMD chips while fast appear
> be starved for data when *big* memory jobs are running. Further I don't
> the cost benefits, if you actually dig into the "bang-for-buck" duals
> seem to win.
d.dppc on gromacs 3.0 calculation on a dual tyan 2460 board:
1 cpu 63 ps/day
dual cpu 179 ps/day
now, if only we could get 8 way athlons!
> The only significant benefit I see from dual is less hardware and higher
> computing density, that may be reason enough to go with duals esp. if your
> application does not require a lot of memory fetches.
> Jim Fraser
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