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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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                                    FORM 8-K

                                 CURRENT REPORT

                       PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                                October 18, 2007
                Date of Report (Date of earliest event reported)

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                                PMC-SIERRA, INC.
             (Exact name of Registrant as specified in its charter)

     Delaware                       0-19084                   94-2925073
  (State or other           (Commission File Number)         (IRS Employer
  jurisdiction of                                        Identification Number)
  incorporation)


                               3975 Freedom Circle
                              Santa Clara, CA 95054
               (Address of Principal Executive Offices) (Zip Code)

                                 (408) 239-8000
              (Registrant's telephone number, including area code)

                                 Not Applicable
          (Former name or former address, if changed since last report)

         Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the Registrant under any of the
following provisions:

          |_|  Written communications pursuant to Rule 425 under the Securities
               Act (17 CFR 230.425)

          |_|  Soliciting material pursuant to Rule 14a-12 under the Exchange
               Act (17 CFR 240.14a-12)

          |_|  Pre-commencement communications pursuant to Rule 14d-2(b) under
               the Exchange Act (17 CFR 240.14d-2(b))

          |_|  Pre-commencement communications pursuant to Rule 13e-4(c) under
               the Exchange Act (17 CFR 240.13e-4(c))


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ITEM 2.02.        Results of Operations and Financial Condition

         On October 18, 2007, PMC-Sierra, Inc. ("Registrant") issued a press
release reporting the financial results for its fiscal third quarter ended
September 30, 2007. The press release is attached hereto as Exhibit 99.1 and
incorporated by reference herein.

         The information in this Form 8-K and the Exhibit, attached hereto,
shall not be deemed to be "filed" for purposes of Section 18 of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to
the liabilities of that section, nor shall it be deemed incorporated by
reference in any filing under the Securities Act of 1933, as amended, or the
Exchange Act, regardless of any general incorporation language in such filing.

         As a supplement to the Registrant's consolidated financial statements
presented on a generally accepted accounting principles (GAAP) basis, the
Registrant provides additional non-GAAP measures for net income and net income
per share in its press release.

         A non-GAAP financial measure is a numerical measure of a company's
performance, financial position, or cash flows that either excludes or includes
amounts that are not normally excluded or included in the most directly
comparable measure calculated and presented in accordance with GAAP. The
Registrant believes that the additional non-GAAP measures are useful to
investors for the performance of financial analysis. Management uses these
measures internally to evaluate its in-period operating performance and the
measures are used for planning and forecasting of the Registrant's future
periods. However, non-GAAP measures are not in accordance with, nor are they a
substitute for, GAAP measures. Other companies may use different non-GAAP
measures and presentation of results.




ITEM 9.01.        Financial Statements and Exhibits

      (c)         Exhibits.

                  99.1     Press release dated October 18, 2007, reporting
                           financial results of Registrant for its fiscal third
                           quarter ended September 30, 2007 (furnished and not
                           filed herewith solely pursuant to Item 2.02).



                                    SIGNATURE

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                        PMC-SIERRA, INC.
                                        (Registrant)


Date: October 18, 2007                  By: /s/ Michael W. Zellner
                                            ------------------------------------
                                                Vice President
                                                Chief Financial Officer and
                                                Principal Accounting Officer




                                  EXHIBIT INDEX


Exhibit
Number                                      Description
- ------            --------------------------------------------------------------
99.1              Press release dated October 18, 2007, reporting financial
                  results of Registrant for its fiscal third quarter ended
                  September 30, 2007.