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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

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

                                January 27, 2005
                Date of Report (Date of earliest event reported)


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

                                    Delaware
                  (State or other jurisdiction of incorporation

          0-19084                                        94-2925073
 (Commission File Number)                   (IRS Employer Identification Number)

                               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 January 27, 2005, PMC-Sierra, Inc. (the "Registrant") issued a press
release reporting the financial results for its fiscal fourth quarter and fiscal
year ended December 26, 2004. 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 (loss) and net
income (loss) 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 January 27, 2005, reporting
                    financial results of PMC-Sierra, Inc. for its fiscal
                    fourth quarter and fiscal year ended December 26, 2004
                    (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: January 27, 2005                       By:  /s/ Alan F. Krock
      ----------------                            -----------------------------
                                                  Alan F. Krock
                                                  Vice President, Finance
                                                  Chief Financial Officer and
                                                  Principal Accounting Officer






                                  EXHIBIT INDEX


Exhibit
Number                                 Description
- -------   ----------------------------------------------------------------------
99.1      Press release, dated January 27, 2005, reporting financial results of
          PMC-Sierra, Inc. for its fiscal fourth quarter and fiscal year ended
          December 26,2004.