[Silicon Motion Technology Corporation Updates Fourth Quarter 2008 Guidance TAIPEI, Taiwan, December 22, 2008 — Silicon Motion Technology Corporation (NasdaqGS: SIMO; the “Company”), a leading fabless semiconductor company that designs, develops, and markets universally compatible, high-performance, low-power semiconductor solutions for the multimedia consumer electronics market, today announced an update to its fourth quarter 2008 financial guidance. The Company now expects:] [Press Release issued by the Company on December 22, 2008. 2 ILICON OTION ECHNOLOGY ORPORATION S]