PathScale Now Supports OpenIB and Introduces New InfiniBand Adapter Cards

FOR IMMEDIATE RELEASE

PathScale InfiniPath Software Release Achieves New Levels of Scalability,
Supports OpenIB

Introduces New Lower Cost, Low-Profile InfiniPath InfiniBand Adapter Cards

MOUNTAIN VIEW, Calif. and SEATTLE ‹ November 15, 2005 ‹ PathScale, the
developer of innovative software and hardware solutions to accelerate high
performance computing, today announced, at SC05, the release of a
low-profile form factor InfiniPath HTX InfiniBand Adapter and the release
of version 1.1 of its InfiniPath software. This latest InfiniPath software
release fully supports the OpenIB Gen 2 software stack and is designed to
maximize application scaling and performance on InfiniBand-based Linux®
clusters.  The new low-profile InfiniPath HTX InfiniBand adapter will be
available in December and is priced at $795.

In addition to supporting the OpenIB stacks, the new InfiniPath 1.1 software
release includes a number of improvements in overall performance and
scalability on MPI and TCP applications.  PathScale has tested the
scalability of dozens of well-known HPC applications on the new 576
Processor AMD Emerald cluster with outstanding results. Using the newly
released software, record-breaking performance has been achieved on the HPC
Challenge, Pallas, and Topcrunch benchmarks.  The 1.1 release also includes
support for a broader range of Linux distributions, including support for
RHEL4, ROCKS 4.0.0, SUSE 10, Fedora Core 4 and CentOS 4.0. The 1.1 release
is immediately available to all existing customers and can be downloaded
from the PathScale support web site.

OpenIB was developed by the OpenIB Alliance, an industry association
chartered to deliver a single, open-source software stack for deploying
InfiniBand solutions. The OpenIB Alliance, founded in June 2004, is
comprised of the leading computer technology vendors and end-user
organizations. OpenIB provides a single, open-source standard that ensures
interoperability between software stacks and hardware products. This
promotes competition in the market and enables PathScale to help drive broad
adoption of InfiniBand, while delivering the most scalable and efficient
solutions for high performance computing.

³With the release of the InfiniPath 1.1 software with OpenIB support,
PathScale is proving that InfiniBand scales to levels only previously
accessible with proprietary interconnects,² said Scott Metcalf, CEO of
PathScale. ³PathScale is showing its leadership position in the InfiniBand
world by showcasing the scalability of InfiniBand and being the first vendor
to bring a supported version of OpenIB to market. PathScale is giving the
scientific and engineering communities more choices in the marketplace,
enabling them to realize the benefits of a truly open standards-based
high-performance interconnect.²

PathScale is also introducing a half-height, or low profile, InfiniBand
adapter card at a reduced price of $795. Because the InfiniPath interconnect
improves the efficiency of the entire cluster, the reduced price makes it
the obvious choice for end-users sensitive to both price/performance and
scalability. The new card, which can be mounted either horizontally in a 1U
server or vertically in a 2U server, gives cluster users more flexibility
for deployment options.

³Voltaire is excited to see Pathscale¹s commitment to OpenIB as demonstrated
in its latest software release,² said Patrick Guay, vice president of
marketing at Voltaire. ³Coupled with the availability of the new low-profile
card, we feel that the choices our customers can enjoy have once again been
expanded.²

The PathScale InfiniPath interconnect delivers on the promise of InfiniBand
and cluster computing by significantly lowering communications latency while
eliminating bottlenecks that can slow down complex applications. The
technology is enabling scientists, engineers, and researchers to more
effectively solve a whole new class of computational challenges, from
weather modeling and aerospace design to drug discovery and oil and gas
research. 

PathScale also will be releasing the newest version of its industry-leading
PathScale EKOPath Compiler Suite, version 2.3. This latest version
introduces autoparallelization support, which can dramatically improve the
performance of applications that utilize multi-processor and multi-core
nodes. Also included in the 2.3 release is a new version of PathOpt, an
innovative performance optimization tool that automatically determines the
best compiler flags for Linux applications when compiled with the EKOPath
Compiler Suite. The award-winning PathScale EKOPath compilers can be
evaluated free for 30 days by visiting www.pathscale.com/trial.php.

PATHSCALE AT SC05
Visitors to the SuperComputing 2005 show in Seattle can see all of the
latest PathScale products running live in the PathScale booth (#422). Live
InfiniPath connected clusters will also be running at AMD¹s booth on
Angstrom servers, in the Microway booth, and in the TeamHPC booth. In
addition, an extensive group of PathScale partners are promoting their
InfiniPath interconnect and EKOPath Compiler Suite offerings. The list
includes Arima, Cisco, Lahey Computer Systems, LSTC, Gridcore AB, HP, IBM,
Iwill, Linux Networx, MSI, SilverStorm, Supermicro, Verari Systems, Voltaire
and Western Scientific.

ABOUT PATHSCALE
PathScale Inc. develops technologies that enable breakthroughs in high
performance computing, science and engineering. The PathScale InfiniPath
HTX Adapter and EKOPath Compiler Suite drive Linux® clusters to performance
levels that can exceed the world¹s most powerful supercomputers. Today,
PathScale technologies are the choice of leading scientific and engineering
organizations to more effectively solve complex computational challenges,
from weather modeling and aerospace design to drug discovery. PathScale is
headquartered in Mountain View, Calif. For more information, visit
www.pathscale.com.

Linux is a registered trademark of Linus Torvalds. HyperTransport and HTX
are licensed trademarks of the HyperTransport Technology Consortium. AMD and
Opteron are trademarks of AMD. InfiniBand is a registered trademark of the
InfiniBand Trade Association. Pathscale, the Pathscale logo and InfiniPath
are trademarks of Pathscale, Inc. All other product names mentioned are
trademarks of their respective owners.

MEDIA CONTACTS:
Christine Flavio
Marketing Director 
PathScale, Inc.
(650) 934-8100
cflavio@pathscale.com

Graham McKenna
PR Manager/Agency Contact
Pacifico Integrated Marketing Communications
(408) 293-8600 x335
gmckenna@pacifico.com