As filed with the Securities and Exchange Commission on November 3, 2000
                                                     Registration No. 333-40508
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                         POST EFFECTIVE AMENDMENT NO. 2
                                       TO
                                    FORM S-8
                             REGISTRATION STATEMENT
                                      Under
                           THE SECURITIES ACT OF 1933

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


              Delaware                                     94-2925073
(State of Incorporation)                    (I.R.S. Employer Identification No.)


                       900 East Hamilton Avenue, Suite 250
                           Campbell, California 95008
                    (Address of principal executive offices)


             Malleable Technologies, Inc. 1998 Stock Incentive Plan
                            (Full title of the plan)


                          The Corporation Trust Company
                               1209 Orange Street
                           Wilmington, Delaware 19801
                                 (800) 677-3394
            (Name, address and telephone number of agent for service)


                                    Copy to:
                                   Neil Wolff
                     Wilson Sonsini Goodrich & Rosati, P.C.
                               650 Page Mill Road
                        Palo Alto, California 94304-1050


                        CALCULATION OF REGISTRATION FEE
================ =========== ============== =================== ================
      Title of                    Proposed         Proposed           Amount
     Securities     Amount        Maximum          Maximum              of
       to be        to be         Offering        Aggregate        Registration
   Registered (1) Registered  Price Per Share   Offering Price         Fee
- ---------------- ----------- ---------------- -----------------  ---------------
 Common Stock,
$0.001 par value  475,188 (2) $     3.26 (2)   $ 1,549,112.88 (2) $   408.96 (3)
- ---------------- ----------- ---------------  ------------------ ---------------
Common Stock,
$0.001 par value  195,197 (4) $ 187.1719 (5)   $ 36,535,393.36    $ 9,645.34 (6)
================ =========== ==============   ================== ===============

  (1)   Pursuant to the  Acquisition  Agreement  dated as of June 13, 2000 among
        PMC-Sierra,  Inc. ("PMC"), Maelstrom Acquisition Corporation,  Malleable
        Technologies,  Inc.  ("Malleable"),  Curits Abbott and State Street Bank
        and Trust Company of California, N.A., PMC assumed, effective as of June
        27, 2000,  all of the  outstanding  options to purchase  common stock of
        Malleable  under the  Malleable  1998  Stock  Incentive  Plan,  and such
        options  became  exercisable  to purchase  shares of PMC's common stock,
        with appropriate  adjustments to the number of shares and exercise price
        of each assumed option.

  (2)   Options  granted  pursuant to an employee  stock option plan.  Estimated
        pursuant to Rule 457(h)(1) under the Securities Act of 1933, as amended,
        solely for the purpose of calculating the registration fee. Based on the
        price per share at which the options may be exercised.

  (3)   $408.26 of the registration fee was previously paid.

  (4)   Shares reserved for future issuance. The amount to be registered in this
        Post Effective Amendment No. 1 to the Registration  Statement is reduced
        by  2,790  shares  from   197,987   shares  as  filed  in  the  original
        Registration Statement on June 29, 2000 (No. 333-40508).

  (5)   This  price  per  share  was used for the  purpose  of  determining  the
        registration fee in the original filing and was calculated in accordance
        with Rule 457(c) under the Securities Act on the basis of the average of
        the high and low prices of PMC's common stock on June 26, 2000 as quoted
        on the Nasdaq National Market.

  (6)   $9,645.34 was previously paid.
================================================================================




                                     PART II
               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT


Item 3.    Incorporation of Documents by Reference.
           ---------------------------------------

           The following documents and information are incorporated by reference
as filed with the Securities and Exchange Commission:

1.         PMC's Annual  Report on Form 10-K for the fiscal year ended  December
           26, 1999, as amended,  excluding Item 6 "Selected Financial Data" and
           Item 8 "Financial  Statements and Supplementary Data" which have been
           superceded by information  contained in the sections of Amendment No.
           1 to PMC's  Registration  Statement on Form S-4,  dated July 26, 2000
           (File No. 333-41878), that are incorporated by reference below;

2.         Of Amendment No. 1 to PMC's Registration Statement on Form S-4, dated
           July 26, 2000 (File No.  333-41878),  only the following sections are
           incorporated herein by reference:  "Selected Historical  Consolidated
           Financial Data of PMC" on pages 5 and 6, "PMC's  financial  condition
           and  results  of  operations"  on  pages 51 and 52,  and "PMC  annual
           financial statements" in Annex E.

3.         PMC's Quarterly  Reports on Form 10-Q for the quarters ended June 25,
           2000 and March 26, 2000;

4.         PMC's Current Reports on Form 8-K dated October 3, 2000, September 1,
           2000,  August 28, 2000,  July 25, 2000, July 12, 2000, June 30, 2000,
           June 20, 2000, April 12, 2000, and March 20, 2000, as amended; and

           All documents  subsequently  filed by PMC pursuant to Sections 13(a),
13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended, prior to
the filing of a  post-effective  amendment  which  indicates that all securities
offered  have been  sold or which  deregisters  all  securities  then  remaining
unsold,  shall be deemed to be  incorporated  by reference in this  registration
statement and to be part hereof from the date of filing such documents.

Item 4.    Description of Securities.
           -------------------------

           Not applicable.

Item 5.    Interests of Named Experts and Counsel.
           --------------------------------------

           Certain  legal matters with respect to the shares will be passed upon
by Wilson, Sonsini,  Goodrich & Rosati, a Professional  Corporation,  Palo Alto,
California.

Item 6.    Indemnification of Directors and Officers.
           -----------------------------------------

           Section  145  of  the  Delaware  General  Corporation  Law  generally
provides that a  corporation  is empowered to indemnify any person who is made a
party to any  threatened,  pending or completed  action,  suit or  proceeding by
reason of the fact that he is or was a director,  officer,  employee or agent of
the corporation or is or was serving, at the request of the corporation,  in any
of such capacities of another corporation or other enterprise, if such director,
officer,  employee  or agent  acted in good faith and in a manner he  reasonably
believed to be in or not opposed to the best interests of the corporation,  and,
with respect to any criminal  action or proceeding,  had no reasonable  cause to
believe his conduct was unlawful.  This statute describes in detail the right of
PMC to indemnify any such person.




         PMC's Certificate of Incorporation  eliminates in certain circumstances
the  liability  of  directors  of PMC for  monetary  damages for breach of their
fiduciary duty as directors.  This provision does not eliminate the liability of
a  director  (i) for  breach of the  director's  duty of  loyalty  to PMC or its
stockholders,  (ii) for acts or  omissions  by the director not in good faith or
which involve  intentional  misconduct or a knowing  violation of law, (iii) for
willful or negligent  declaration  of an unlawful  dividend,  stock  purchase or
redemption or (iv) for transactions  from which the director derived an improper
personal benefit.

         PMC's  Certificate  of  Incorporation   also  provides   generally  for
indemnification  of all  directors  and  officers of PMC to the  fullest  extent
permitted by the General Corporation Law of the State of Delaware. Such right to
indemnification  shall be deemed to be a contract  right and includes  generally
the right to be paid by PMC the expenses  incurred in defending  any  proceeding
covered by this provision in advance of its final  disposition.  Individuals who
are entitled to  indemnification  may bring suit to seek recovery of amounts due
under the  foregoing  provisions  and to recover  the  expenses  of such suit if
successful.

         PMC has entered into indemnification agreements to such effect with its
officers and directors containing  provisions which are in some respects broader
than  the  specific   indemnification   provisions   contained  in  the  General
Corporation  Law of Delaware.  The  indemnification  agreements may require PMC,
among other things,  to indemnify  such officers and directors  against  certain
liabilities  that may arise by reason of their status or service as directors or
officers (other than liabilities  arising from willful  misconduct of a culpable
nature) and to advance  their  expenses  incurred as a result of any  proceeding
against them as to which they could be indemnified.

         PMC believes that it is the position of the Commission  that insofar as
the  foregoing  provisions  may be invoked to  disclaim  liability  for  damages
arising under the Securities  Act, such  provisions are against public policy as
expressed in the Securities Act and are therefore unenforceable.

         PMC currently maintains an officers' and directors' liability insurance
policy which covers,  subject to the exclusions  and  limitations of the policy,
officers and directors of PMC against certain  liabilities which may be incurred
by them solely in such capacities.

Item 7.    Exemption from Registration Claimed.
           -----------------------------------

           Not applicable.

Item 8.    Exhibits.
           --------

  Exhibit
  Number

      4.1+      Malleable Technologies, Inc. 1998 Stock Incentive Plan

      4.2+      Form of Stock Option  Agreement  under  Malleable  Technologies,
                Inc. 1998 Stock Incentive Plan

      5.1       Opinion  of  Wilson  Sonsini  Goodrich  &  Rosati,  Professional
                Corporation

     23.1       Consent of Deloitte & Touche LLP,  Vancouver,  British Columbia,
                Canada, Independent Auditors

     23.2       Consent  of  Deloitte  &  Touche  LLP,  San  Jose,   California,
                Independent Auditors

     23.3+      Consent of Counsel (Contained in Exhibit 5.1 above)

   + Previously filed.


Item 9.    Undertakings.
           ------------

           (a)    PMC hereby undertakes:

                  (1)      To file,  during any period in which  offers or sales
                           are being made,  a  post-effective  amendment to this
                           registration   statement   to  include  any  material
                           information  with respect to the plan of distribution
                           not   previously   disclosed   in  the   registration
                           statement or any material change to such  information
                           in the registration statement.

                  (2)      That,  for the purpose of  determining  any liability
                           under the  Securities  Act, each such  post-effective
                           amendment  shall be deemed  to be a new  registration
                           statement relating to the securities offered therein,
                           and the  offering  of such  securities  at that  time
                           shall be deemed to be the initial bona fide  offering
                           thereof.

                  (3)      To   remove   from    registration    by   means   of
                           post-effective  amendment any of the securities being
                           registered  which remain unsold at the termination of
                           the offering.

         (b)      PMC hereby  undertakes  that, for purposes of determining  any
liability  under the Securities Act, each filing of PMC's annual report pursuant
to Section  13(a) or Section 15(d) of the Exchange Act (and,  where  applicable,
each filing of an employee  benefit  plan's  annual  report  pursuant to Section
15(d) of the Exchange Act) that is incorporated by reference in the registration
statement  shall be deemed to be a new  registration  statement  relating to the
securities  offered  therein,  and the offering of such  securities at that time
shall be deemed to be the initial bona fide offering thereof.

         (c)      Insofar as indemnification  for liabilities  arising under the
Securities Act may be permitted to directors,  officers and controlling  persons
of PMC pursuant to the Delaware  General  Corporation  Law, the  Certificate  of
Incorporation  or the Bylaws of PMC,  Indemnification  Agreements  entered  into
between PMC and its officers and directors,  or otherwise,  PMC has been advised
that in the opinion of the  Commission  such  indemnification  is against public
policy as expressed in the Securities Act and is, therefore,  unenforceable.  In
the event that a claim for indemnification  against such liabilities (other than
the payment by PMC in the successful defense of any action,  suit or proceeding)
is asserted by such director,  officer or controlling  person in connection with
the securities being registered  hereunder,  PMC will,  unless in the opinion of
its counsel the matter has been settled by  controlling  precedent,  submit to a
court of appropriate  jurisdiction the question whether such  indemnification by
it is against  public  policy as  expressed  in the  Securities  Act and will be
governed by the final adjudication of such issue.





                                   SIGNATURES

         Pursuant to the  requirements of the Securities Act, PMC certifies that
it has reasonable  grounds to believe that it meets all of the  requirements for
filing on Form S-8 and has duly caused this Registration  Statement or amendment
thereto  to  be  signed  on  its  behalf  by  the  undersigned,  thereunto  duly
authorized, in New York, New York, on this November 3, 2000.

                                PMC-SIERRA, INC.

                                By:  /s/ JOHN W. SULLIVAN
                                    -----------------------------------------
                                    John W. Sullivan, Vice President, Finance
                                    (Principal Financial and Accounting Officer)



 Signature                      Title                                Date
- --------------------------------------------------------------------------------

/s/ ROBERT L. BAILEY*      President, Chief Executive Officer   October __, 2000
- --------------------       (Principal Executive Officer) and
Robert L. Bailey           Chairman of the Board of Directors


/s/ JOHN W. SULLIVAN       Vice President, Finance (Principal   October __, 2000
- --------------------       Financial and Accounting Officer)
John Sullivan

/s/ JAMES DILLER*          Director                             October __, 2000
- ----------------
James Diller

/s/ ALEXANDRE BALKANSKI*   Director                             October __, 2000
- -----------------------
Alexandre Balkanski

/s/ COLIN BEAUMONT*        Director                             October __, 2000
- ------------------
Colin Beaumont

/s/ FRANK J. MARSHALL*     Director                             October __, 2000
- ---------------------
Frank J. Marshall


*By: /s/ JOHN SULLIVAN
John Sullivan
Attorney-in-Fact