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Press Release
October 11, 2005

New Secure Digital (SD) And MultiMediaCard (MMC) Controllers from Silicon Motion Set New Performance Standards

Taipei, Taiwan, R.O.C., October 11, 2005 - Silicon Motion Technology Corporation (NASDAQ : SIMO; the "Company"), a leading fabless semiconductor company that designs, develops, and markets universally compatible, high-performance, low-power semicondutor solutions for the multimedia consumer electronics market, today announced the availability of a new generation of high performance flash card controllers for use in Secure Digital (SD) cards and MultiMediaCards (MMC). 

The new SM265 controller in dual channel mode delivers a read transfer rate of 34 megabytes (MB) per second (200x) and a write transfer rate of 25 MB per second (166x). The new SM266 controller in dual channel mode achieves read transfer rate of 22.5 MB per second (150x) and a write transfer rate of 20 MB per second (133x).

Both SM265 and SM266 controllers are capable of supporting a wide variety of NAND flash memory, including single level cell (SLC) and multilevel cell (MLC) technology, and both 8-bit and16-bit NAND flash interfaces. Both controllers have Reed-Solomon error correcting code (ECC) built into the hardware to achieve data retention without compromising performance.

The SM265 controller is compliant with MMC 3.3, 4.0, and 4.1 specifications. The SM266 controller complies with SD 1.1 specifications and includes support for CPRM (Content Protection for Recordable Media) to enforce copyright protection.

In keeping with Silicon Motion's strength of delivering universal compatibility, both SM265 and SM266 controllers have been extensively and successfully tested for compatibility with almost one thousand host devices, including PDAs, card readers, digital still cameras, digital video cameras, mobile phones, MP3 players, personal computers, printers, and other electronic devices that accept flash memory cards.

Arthur Yeh, Vice President in charge of Asia Pacific Sales at Silicon Motion, commented, "In September, we shipped over 10 million units of SD and MMC controllers. It set a new monthly record for us and demonstrated the wide acceptance of our controllers by the market. Our universal compatibility, high performance, competitive pricing, and dedicated high-quality customer support have allowed us to become the leader in this market. The two new controllers we are announcing today extend our SD and MMC controller family by offering much faster read and write performance and should allow us to continue to lead this fast growing market."

Silicon Motion Technology Corporation is a leading fabless semiconductor company that designs, develops, and markets universally compatible, high-performance, low-power semiconductor solutions for the multimedia consumer electronics market. The Company's semiconductor solutions include controllers used in mobile storage media, such as flash memory cards and USB flash drives, and multimedia systems on a chip, or SoCs, used in digital media devices such as MP3 players, PC cameras, PC notebooks and broadband multimedia phones.

This press release contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward-looking statements include, without limitation, statements regarding trends in the multimedia consumer electronics market and our future results of operations, financial condition and business prospects. In some cases, you can identify forward-looking statements by terminology such as "may," "will," "should," "expect," "intend," "plan," "anticipate," "believe," "estimate," "predict," "potential," "continue," or the negative of these terms or other comparable terminology. Although such statements are based on our own information and information from other sources we believe to be reliable, you should not place undue reliance on them. These statements involve risks and uncertainties, and actual market trends or our actual results of operations, financial condition or business prospects may differ materially from those expressed or implied in these forward looking statements for a variety of reasons. Potential risks and uncertainties include, but are not limited to, unpredictable volume and timing of customer orders, which are not fixed by contract but vary on a purchase order basis; the loss of one or more key customers or the significant reduction, postponement, rescheduling or cancellation of orders from these customers; general economic conditions or conditions in the semiconductor or multimedia consumer electronics markets; decreases in the overall average selling prices of our products; changes in the relative sales mix of our products; changes in our cost of finished goods; the availability, pricing, and timeliness of delivery of other components and raw materials used in our customers' products; our customers' sales outlook, purchasing patterns, and inventory adjustments based on consumer demands and general economic conditions; our ability to successfully develop, introduce, and sell new or enhanced products in a timely manner; and the timing of new product announcements or introductions by us or by our competitors. For additional discussion of these risks and uncertainties and other factors, please see the documents we file from time to time with the Securities and Exchange Commission, including the registration statement on Form F-1 filed on June 24, 2005. We assume no obligation to update any forward-looking statements, which apply only as of the date of this press release.

Media Contact:
Sara Hsu
Project Manager
Tel: +886 2 2219 6688 x3509
Fax: +886 2 2219 6868