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Press Release
December 17, 2010

Silicon Motion Announces Upcoming Schedule of Events with the Financial Community

Taipei, Taiwan—December 17, 2010—Silicon Motion Technology Corporation (NasdaqGS: SIMO),
a leading fabless semiconductor company that designs, develops, and markets high-performance,
low-power semiconductor solutions for the multimedia consumer electronics market, today
announced that it will participate in the following upcoming conferences:

The 11th Nomura @ CES 2011
Thursday, January 6, 2011 (meetings only; no Webcast)
Bellagio Las Vegas – Las Vegas, NV

The Gleacher & Co. CES Conference
Friday, January 7, 2011 11:00am (Pacific Time; no Webcast)
Venetian Hotel – Las Vegas, NV

The 13th Annual Needham Growth Conference
Wednesday, January 12, 2011 4:10 p.m. (Eastern Time; Webcast)
New York Palace Hotel – New York, NY

Bank of America Merrill Lynch “2011 Taiwan, Technology & Beyond” Conference
Wednesday, March 16, 2011 (meetings only; no Webcast; tentative date)
Shangri-La’s Far Eastern Plaza Hotel – Taipei, Taiwan

Interested parties can listen to a live audio Webcast of the Company’s presentation on the Investor
Relations section of Silicon Motion’s website at www.siliconmotion.com. A replay of the Webcast
will be available for a limited period of time following the event.

About Silicon Motion:
We are a fabless semiconductor company that designs, develops and markets high performance, lowpower
semiconductor solutions for the multimedia consumer electronics market. We have three
major product lines: mobile storage, mobile communications, and multimedia SoCs. Our mobile
storage business is composed of microcontrollers used in NAND flash memory storage products
such as flash memory cards, USB flash drives, SSDs, and embedded flash applications. Our mobile
communications business is composed primarily of mobile TV IC solutions and CDMA RF ICs. Our
multimedia SoCs business is composed primarily of embedded graphics processors.

Investor Contact:                                                       Investor Contact:
Jason Tsai                                                                 Selina Hsieh
Director of IR and Strategy                                      Investor Relations
Tel: +1 408 519 7259                           Tel: +886 3 552 6888 x2311
Fax: +1 408 519 7101                                               Fax: +886 3 560 0336
E-mail: jtsai@siliconmotion.com                           E-mail: ir@siliconmotion.com

Media Contact:
Sara Hsu
Project Manager
Tel: +886 2 2219 6688 x3509
Fax: +886 2 2219 6868
E-mail: sara.hsu@siliconmotion.com