Wanted: Good mobo for Intel 850E chipset and 1066 RDRAM
jeff at aslab.com
Fri Aug 30 12:18:18 PDT 2002
You should get P4T533-C instead of P4T533. The latter requires
RIMM4200 modules which are harder to get and cost more. In
addition, there are only 2 RIMM slots in P4T533. That would
require you to purchase higher cost, higher density memory to
Since these boards are designed for the low cost, desktop market,
there won't be any support for 64-bit slots. Maybe that will be
change in the coming years.
----- Original Message -----
From: "Camm Maguire" <camm at enhanced.com>
To: <josip at icase.edu>
Cc: <beowulf at beowulf.org>
Sent: Friday, August 30, 2002 11:52 AM
Subject: Re: Wanted: Good mobo for Intel 850E chipset and 1066 RDRAM
> Greetings, all, and many thanks for your helpful replies.
> OK, we're thinking about the Asus P4T533 motherboards with 1066 RAMBUS
> memory. This is a 16-node cluster upgrade. Our old network was
> dual-channel-bonded 100Mbit switched ethernet. In general, we leave
> the network unsaturated by a fair margin on our critical code, but do
> find that the network is a slight bottleneck on small problems.
> We're considering a gigabit network upgrade, probably using the Intel
> PRO/1000T adapters together with the driver in the latest 2.4.20-pre
> kernel. Unfortunately, the Asus motherboards only have 32bit/33Mhz
> PCI slots. As best as we can figure, this will shave a factor of 2
> off of the peak possible network throughput otherwise attainable.
> Which means that we could expect a rough factor of 2 remaining in
> throughput over our existing setup, with no improvement in latency.
> The nodes are going from PIII 850Mhz with SDRAM to P4 2.53 and
> RAMBUS. As far as we can tell, this amounts to a factor of 6 for cpu
> intensive work (taking into account the extra factor of 2 provided by
> the SSE2 instructions), and something less but still high on
> memory-bottleneck problems. So the capability of the machine is being
> tilted further in the node capacity direction relative to the network
> We're trying to decide if we should take a 30% hit on memory speed in
> exchange for a factor of 2 in network throughput by going to RAMBUS
> PC800 motherboards with a faster PCI slot. Of course, if anyone knows
> of a motherboard supporting both RAMBUS 1066 and either 64bit PCI or
> 66Mhz PCI, that would be ideal, but such animals apparently do not yet
> Any advice, suggestions, or commentary are most appreciated.
> Take care,
> P.S. We're looking at the Netgear GS516T gigabit switch. So far
> we've been unable to discern whether this switch supports 'jumbo
> frames' or whether such settings are even necessary with the Intel
> cards. Any illumination here would be appreciated as well!
> Josip Loncaric <josip at icase.edu> writes:
> > I forgot to mention one more thing: high speed memory like PC1066 tends
> > hot. Users suggest to have good airflow over the memory modules (e.g.,
> > wiring out of the way).
> > Sincerely,
> > Josip
> > --
> > Dr. Josip Loncaric, Research Fellow mailto:josip at icase.edu
> > ICASE, Mail Stop 132C PGP key at http://www.icase.edu./~josip/
> > NASA Langley Research Center mailto:j.loncaric at larc.nasa.gov
> > Hampton, VA 23681-2199, USA Tel. +1 757 864-2192 Fax +1 757 864-6134
> Camm Maguire camm at enhanced.com
> "The earth is but one country, and mankind its citizens." -- Baha'u'llah
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