Substantial New Questions of Patentability Raised by Prior Art Relating to

     Broadcom's Patents-in-Suit; Ex-Parte Reexamination Request Filings

                                 Completed



    SAN JOSE, Calif., Aug. 6 /EMWNews/ -- SiRF Technology

Holdings, Inc. (Nasdaq: SIRF), a leading provider of GPS-powered location

platforms, today announced that it has completed filing with the U.S.

Patent and Trademark Office respective Requests for Ex-Parte Reexamination

of each of the four patents that Broadcom recently asserted against SiRF in

the Santa Ana, California federal district court.



    Through its respective Reexamination Requests and in view of

substantial new questions of patentability raised by prior art not

previously considered by the Patent Office, SiRF seeks review and

invalidation of all four of the Broadcom patents-in-suit. Additionally,

SiRF intends to seek a stay of the federal district court case.

    About SiRF Technology Holdings, Inc.



    SiRF Technology Holdings, Inc. develops and markets location platforms

based on semiconductor and software products that are designed to enable

location-awareness utilizing GPS and other location technologies, enhanced

by wireless connectivity and multimedia capabilities for high-volume mobile

consumer devices and commercial applications. SiRF's technology has been

integrated into a wide range of mobile consumer devices such as automobile

navigation systems, portable navigation devices (PNDs), mobile phones,

mobile computers, GPS-based peripherals and handheld GPS devices, and into

commercial applications such as location servers, asset tracking devices

and fleet management systems. SiRF markets and sells its products in four

target platforms: wireless handheld devices such as mobile phones;

automotive electronics systems, including navigation and telematics

systems; consumer electronics products such as recreational GPS handhelds,

mobile gaming machines, digital cameras and wearable devices; and mobile

computing systems, including personal digital assistants, notebook

computers, universal mobile personal computers (UMPCs) and mobile internet

devices. Founded in 1995, SiRF is headquartered in San Jose, California,

and has sales offices, design centers and research facilities around the

world. The company trades on the NASDAQ Stock Exchange under the symbol

SIRF. Additional information about SiRF and its location technology

solutions can be found at http://www.sirf.com.



    Forward Looking Statements



    Except for the historical information contained herein, the matters set

forth in this press release, including, but not limited to, statements

regarding the benefits, features and design objectives of our products, and

the assumptions underlying the statements, such as whether or not the U.S.

Patent and Trademark Office (the "U.S. PTO") agrees with the questions of

patentability and whether or not the U.S. PTO will grant re-examination to

any of the patents-in-suit, whether SiRF can successfully seek a stay of

the case in the federal district Court are forward-looking statements

within the meaning of the Private Securities Litigation Reform Act of 1995.

Words such as "to," "being," "possible," "may," "will," "addresses,"

"designed to," "expand", "provide," "believe," and similar expressions are

intended to identify forward-looking statements. These statements are not

guarantees of future performance and should not be considered as an

indication of future performance. SiRF's actual results could differ

materially from those discussed in these forward looking statements as a

result of risks and uncertainties, including, among others, demand and

market acceptance for our products and those of our customers, the market

for GPS-based location awareness, risks associated with the semiconductor

industry and other risks and uncertainties discussed in the SiRF's Annual

Report on Form 10-K for the fiscal year ended December 31, 2007, SiRF's

Quarterly Report on Form 10-Q for the quarter ended March 31, 2008 and from

time to time in SiRF's SEC reports. These forward looking statements speak

only as of the date hereof. We do not undertake any obligation to update

forward-looking statements.



    SiRF, the SiRF orbit logo, SiRFstar, SiRFLoc and SiRFDRive are

registered trademarks of SiRF Technology, Inc. SiRFPrima, , SiRFInstant,

SiRFInstantFix, SiRFDiRect, and SiRFecosystem are trademarks of SiRF

Technology, Inc. All other corporate names or trademarks are the properties

of their respective owners.