Applied Micro Circuits Corporation (AMCC) [NASDAQ: AMCC], today announced the next generation of 3ware hardware SATA RAID controllers designed for high-performance PCI-Express® platforms. The 3ware 9590SE family is based on StorSwitch™, AMCC’s seventh generation non-blocking switched fabric storage architecture, extending the performance and feature set of the proven 3ware 9550SX.

The 3ware 9590SE family is available in 8-, 12- and 16-port versions, allowing a single controller to manage up to 8TB of raw storage with 500GB drives. The feature-rich controllers offer support for SATA II, including native command queuing (NCQ). All members of the family are also available with AMCC’s innovative Multi-lane connector system, with its highly reliable, locking cable/connector system that combines 4 SATA ports into a single locked connection on the controller. Multi-lane backplanes are available from several chassis vendors, bringing efficient cable routing, improved airflow and enhanced reliability to high-density storage applications.

“Our customers develop products in a broad range of applications, from network-attached storage (NAS) and disc-to-disc backup systems to video editing and security video recording. These rapidly-evolving applications continue to demand higher performance,” said Ron Macleod, sales director, AMCC Storage, for Europe, Middle East and Africa (EMEA). “The 3ware 9590SE allows system integrators to leverage the performance of the PCI-Express platform, as well as delivering high-density and data protection features at a cost-effective price point.”

The 3ware 9590SE family implements AMCC’s StorSave feature set, a powerful combination of reliability enhancements and an optional Battery Backup Unit (BBU) that maximize data protection and system reliability without sacrificing I/O performance in critical RAID modes, and which allow the 9590SE to use and protect both controller cache and disk cache.

For applications where several data streams are written simultaneusly, the 9590SE family also offers AMCC’s StreamFusion technology, an intelligent cache algorithm that maximizes application performance under heavy loads by dynamically detecting the presence of multiple simultaneous write data streams and efficiently allocating controller cache for maximum bandwidth, preventing the controller from becoming the performance bottleneck.

AMCC Overview

AMCC is a global leader in network and embedded PowerPC processing, optical transport and storage solutions. Our products enable the development of converged IP-based networks offering high-speed secure data, high-definition video and high-quality voice for carrier, metropolitan, access and enterprise applications. AMCC provides networking equipment vendors with industry-leading network and communications processing, Ethernet, SONET and switch fabric solutions. AMCC is also the leading vendor of high-port count

SATA RAID controllers enabling low-cost, high-performance, high-capacity storage. AMCC's corporate headquarters are located in Sunnyvale, California. Sales and engineering offices are located throughout the

world.

For further information regarding AMCC, please visit our web site at http://www.amcc.com.

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Forward Looking Statements

The statements contained in this press release that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such forward-looking statements, including statements relating to the products discussed in this press release are subject to a number of risks and uncertainties, including the risk that the products would not be successfully or timely developed, completed or manufactured or achieve market acceptance, risks relating to general economic conditions, as well as the risks and uncertainties set forth in the Company's Annual Report on Form 10-K for the year ended March 31, 2004, and in other filings of the Company with the Securities and Exchange Commission. As a result of these risks and uncertainties, actual results may differ materially from these forward-looking statements. The forward-looking statements contained in this news release are made as of the date hereof and AMCC does not assume any obligation to update any forward-looking statement.

AMCC, 3ware, and StorSwitch are trademarks or registered trademarks of Applied Micro Circuits Corporation. All other trademarks are property of their respective owners.