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FOR IMMEDIATE RELEASE
CONTACT:
Gay Lynn Moore
Myricom, Inc.
626-437-5002
gaylynn@myri.com

      MYRICOM INTRODUCES NEW MYRINET SWITCHES FOR LARGE CLUSTERS

Arcadia, Calif., June 24, 2004 - Myricom (www.myri.com) announced
today at the International Supercomputer Conference in Heidelberg a
new series of Myrinet switches with up to 1280 fiber ports in a 14U
rackmount enclosure.  These switches are based on a new, 32-port,
Myrinet crossbar-switch chip, which is also slated for use in other
Myricom Myrinet-switch products and in OEM blade systems.

These new products specifically address the growing market for
clusters in the range from hundreds to thousands of host computers.
They reduce the cost of the switch network, and simplify the
installation and operation of large clusters.

Myrinet clusters are used for computationally demanding scientific and
engineering applications, and for data-intensive web and database
applications.  There are many thousands of Myrinet clusters in use in
more than 50 countries, including several systems with more than 2000
processors.  Myrinet technology is used in 37.4% of the June-2004
TOP500 sites.

This line-card-based series of switches has many configurations.  A
standalone 256-host full-bisection Clos network has a list price of
only $312 per host port, and will simplify and reduce the cost of the
installation of Myrinet clusters of this size.

A configuration with 256 host ports and 256 interswitch ports is one
of the building blocks for switch networks for clusters with 512, 768,
1024, 1280, and all the way up to 8192 hosts.  Two of the "256 up, 256
down" switches can be connected together for 512 hosts.  At larger
sizes, the "256 up, 256 down" units connect to spine switches with up
to 1280 ports each.  A special feature of these large configurations,
which are full-bisection Clos networks, is that all interswitch
connections use quad-fiber ribbon cables, thus simplifying
installation.

The high port density of these switches is achieved by using fiber
rather than copper cables.  Myrinet-2000 fiber links operate at a data
rate of 2+2 Gigabits per second on multimode fiber up to 200m.

This series of Myrinet switches have a full complement of enterprise
features.  The 14U rackmount enclosure uses front-to-back air flow,
with separate air paths for the four hot-swappable N+1 redundant power
supplies and for the line cards.  The line-card cooling uses two
series pairs of hot-swappable blowers with N+2 redundancy.  All line
cards are also hot-swappable.

Switch monitoring is provided via dual-redundant 10/100 ethernet ports
and a built-in color TFT display.  An internal network of
microcontrollers reports to a Linux-based microprocessor information
that includes the status of all ports, packet counts, packet errors,
internal voltages, currents, temperatures, and blower speeds.


About Myricom

Myricom, Inc., a privately held California Corporation founded in
1994, created Myrinet, the leading high-speed network for connecting
computers to form clusters.  In addition to direct sales, Myricom
supplies Myrinet products and software to IBM, HP, Dell, NEC, Sun,
Linux Networx, Cray, and many other OEM and system-integration
companies.

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Myricom and Myrinet are registered trademarks of Myricom, Inc.