PMC Sierra (PMCS) 8-K/A Completion of Acquisition or Disposition of Assets

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-44204, 333-34648, 33-86930, 33-90392, 33-96620, 33-97490, and 333-132447) and on Form S-8 (Nos. 333-45118, 333-40508, 333-44212, 33-41027, 33-80988, 33-94790, 333-142980, 333-13387, 333-13359, 333-13357, 333-56244, 333-48110, 333-35276, 333-34622, 333-94999, 333-92885, 333-87039, 333-55983, 333-55991, 333-34671, 333-81414, 333-102747, 333-133830, 333-115123, 333-128427, 333-152966, 333-159174, 333-165153, 333-171295, 333-171321) of our report dated May 7, 2010, with respect to the consolidated financial statements of Wintegra, Inc. as of December 31, 2009 included in this Amended Current Report (Form 8-K/A) of PMC-Sierra, Inc. and to the use of that report in this Form 8-K/A.

/s/ Kost Forer Gabbay & Kasierer

Kost Forer Gabbay & Kasierer

A Member of Ernst & Young Global

Tel Aviv, Israel

January 28, 2011