PLX Technology (PLXT) 10-Q 2012 Q2 Quarterly report

EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of PLX Technology, Inc. (the "Company") on Form 10-Q for the period ended June 30, 2012 as filed with the Securities and Exchange Commission (the "Report"), I, Ralph H. Schmitt, Chief Executive Officer of the Company, hereby certify as of the date hereof, solely for purposes of Title 18, Chapter 63, Section 1350 of the United States Code, that to the best of my knowledge:

1.   the Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, and

2.   the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company at the dates and for the periods indicated.

This Certification has not been, and shall not be deemed, "filed" with the Securities and Exchange Commission.

Date: August 8, 2012

By:/s/ Ralph H. Schmitt

 Ralph H. Schmitt

 Chief Executive Officer