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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

                                 August 4, 2005
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                Date of Report (Date of earliest event reported)

                                     CEPHEID
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             (Exact name of Registrant as specified in its charter)

       California                  000-0030755                   77-0441625
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(State of incorporation)     (Commission file number)        (I.R.S. Employer
                                                            Identification No.)

                               904 Caribbean Drive
                               Sunnyvale, CA 94089
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          (Address of principal executive offices, including zip code)

                                 (408) 541-4191
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              (Registrant's telephone number, including area code)

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 (see General Instruction A.2. below):

[ ] 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.

The information in this report and the exhibit attached hereto are being
furnished pursuant to Item 2.02 of Form 8-K and shall not be deemed "filed" for
purposes of Section 18 of the Securities Exchange Act of 1934, nor shall they be
deemed incorporated by reference in any filing with the Securities and Exchange
Commission under the Securities Act of 1934 or the Securities Act of 1933,
except as shall be expressly set forth by specific reference to such filing.

On August 4, 2005, Cepheid issued a press release announcing its financial
results for the quarter ended June 30, 2005 and certain other information. The
press release is attached to this report as Exhibit 99.1.

ITEM 9.01:   FINANCIAL STATEMENTS AND EXHIBITS.

             (c)      Exhibits.

Number                Description
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99.1                  Press release dated August 4, 2005



                                   SIGNATURES

        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.

                                                  CEPHEID

Date:   August 4, 2005                            By:    /S/ JOHN L. BISHOP
                                                         -----------------------
                                                  Name:  John L. Bishop
                                                  Title: Chief Executive Officer



                                  EXHIBIT INDEX

Number                Description
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99.1     Press Release dated August 4, 2005.