-- World's Fastest Compilers for 64-bit Linux Clusters Continue to
Build Strong Market Momentum --

Mountain View, CA — February 23, 2005 —
PathScale, developer of innovative software and hardware solutions to
accelerate the performance and efficiency of Linux clusters, has been voted
the 2004 Supercomputing Product of the Year in an online readers poll
conducted annually by SupercomputingOnline.com, a leading Web-based news
source for high performance computing, networking and communications
professionals.

The annual survey of readers of the online journal asks HPC professionals
to cast their votes for the years top supercomputing products. The online poll
was completed on February 1, 2005 with the PathScale EKOPath Compiler Suite
receiving close to 50 percent of the total votes among nine nominated HPC
products.

"Many of our readers voted in this poll and PathScale was ahead by a
substantial margin when we officially stopped recording the votes on February
1st," said Chris ONeal, publisher of SupercomputingOnline. "This is
evidence that the PathScale compilers have scored a big win in the minds of
our readers and says volumes about the reputation that PathScale earned for
itself during 2004.

Three months earlier, the PathScale Compiler Suite was honored with the
Reader's Choice Award for "Greatest Price Performance in a Software
Application" presented at the Supercomputing 2004 Conference by the
publishers of HPCwire, a global publication for High Performance
Computing.

"The fact that so many HPC professionals are telling
leading journalists that they are impressed with the performance and stability
of the PathScale compilers is testament to the strong market momentum that
PathScale has achieved," said Scott Metcalf, CEO of PathScale.

In January 2005, PathScale shipped version 2.0 of its industry-leading
compilers for C, C++, and Fortran 77/90/95. PathScale compilers enable the
world's fastest applications performance for 64-bit Linux systems, and
developers targeting Linux clusters will realize immediate performance
benefits by switching to EKOPath 2.0. This newest version is available at no
additional cost to all current PathScale subscribers, and a 30-day free trial
is available to new customers at www.pathscale.com/trial.php.

PathScale EKOPath compilers provide comprehensive support for the AMD64 and
Intel Xeon EM64T processor families. Global HPC vendors such as HP, IBM, Linux
Networx, Fujitsu Siemens and Sun routinely use PathScale compilers to showcase
the performance gains that can be achieved with their systems when running
applications compiled with PathScale.

About PathScale

Based in Mountain View, California, PathScale develops innovative software
and hardware technologies that substantially increase the performance and
efficiency of Linux clusters, the next significant wave in high-end computing.
Applications that benefit from PathScale's technologies include seismic
processing, complex physical modeling, EDA simulation, molecular modeling,
biosciences, econometric modeling, computational chemistry, computational
fluid dynamics, finite element analysis, weather modeling, resource
optimization, decision support and data mining. PathScale's investors include
Adams Street Partners, Charles River Ventures, Enterprise Partners Venture
Capital, CMEA Ventures, ChevronTexaco Technology Ventures and the Dow
Employees Pension Plan. For more details, visit www.pathscale.com; send email to sales@pathscale.com or telephone
1-650-934-8100.

PathScale and EKOPath are trademarks of PathScale, Inc.
AMD and Opteron are trademarks of Advanced Micro Devices. Intel and Xeon are
trademarks of Intel. Linux is a trademark of Linus Torvalds. All other
trademarks and company names mentioned are the property of their respective
owners.