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SECURITIES AND
EXCHANGE COMMISSION
WASHINGTON D.C. 20549

# FORM 40-F

[Check one] 
[    ]    REGISTRATION
STATEMENT PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934
[X]    ANNUAL REPORT PURSUANT TO SECTION 13(a) OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

|For the Fiscal Year
endedAugust 31, 2005 |  | Commission
File Number029872 | 
|---------------------------------------- |  | ---------------------------- | 

| | ATI TECHNOLOGIES INC.(Exact name of registrant as specified in its charter) | 
| | --------------------------------------------------------------------------- | 

|                                   |                                            
|---------------------------------- | -------------------------------------------
|Province of Ontario, Canada        | 5045, 3575                                 
|(Province or other jurisdiction of | (Primary Standard Industrial               
|incorporation or organization)     | Classification Code Number (if applicable))

|                                          |  |                                                 | 
|----------------------------------------- |  | ----------------------------------------------- | 
|1 Commerce Valley Drive East              |  | CT Corporation System                           | 
|Markham, Ontario, Canada L3T 7X6          |  | 111 Eighth Avenue                               | 
|(905) 882-2600                            |  | New York, NY 10011                              | 
|                                          |  | (212) 894-8700                                  | 
|(Address and telephone number of          |  | (Name, address (including zip code) and         | 
|Registrant's principal executive offices) |  | telephone number (including area code) of agent | 
|                                          |  | for service in the United States)               | 

Securities registered or to be
registered pursuant to Section 12(b) of the Act:   None

Securities registered or to be
registered pursuant to Section 12(g) of the Act:    Common Shares

Securities for which there is a
reporting obligation pursuant to Section 15(d) of the Act:    None

For annual reports, indicate by check
mark the information filed with this Form:

[X]   Annual
information form          [X]   Audited
annual financial statements

Indicate
the number of outstanding shares of the issuers classes of capital or
common stock as of the close of the period covered by the annual report:

As at August 31, 2005  251,473,305 Common Shares outstanding.

Indicate
by check mark whether the Registrant by filing the information contained in this Form is
also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b)
under the Securities Exchange Act of 1934 (the Exchange Act). If Yes is
marked, indicate the filing number assigned to the Registrant in connection with such
Rule.

Yes  ______            No  ___X___

Indicate
by check mark whether the Registrant (1) has filed all reports required to be filed by
Section 13 or 15(d) of the Securities Exchange Act during the preceding 12 months (or for such
shorter period that the Registrant was required to file such reports); and (2) has been
subject to such filing requirements for the past 90 days.

Yes  ___X___            No  ______

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The total number of pages in this document is 126.
The exhibit index is located on page 7.

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# DISCLOSURE CONTROLS AND
PROCEDURES

As
of the end of the fiscal year of ATI Technologies Inc. (the Registrant), an
evaluation was carried out under the supervision of and with the participation of the
Registrants management, including its Chief Executive Officer and Chief Financial
Officer, of the effectiveness of the Registrants disclosure controls and procedures
(as defined in Rules 13a-15(e) and 15d-15(e) under the U.S. Exchange Act of 1934 (the
Exchange Act)). Based on that evaluation, the Registrants Chief
Executive Officer and Chief Financial Officer concluded that the design and operation of
these disclosure controls and procedures were effective as of August 31, 2005, the end of
the period covered by the annual report, to ensure that material information relating to
the Registrant and its consolidated subsidiaries would be made known to them by others
within those entities.

There
has been no change in the Registrants internal control over financial reporting
during the year ended August 31, 2005 that materially affected, or that is reasonably
likely to materially affect, the Registrants internal control over financial
reporting.

As
recommended by the Securities and Exchange Commission (the SEC) in its
adopting release, we will continue to periodically evaluate our disclosure controls and
procedures and internal control over financial reporting and we will be making
modifications from time to time as deemed necessary to ensure that information is
recorded, processed, summarized and reported within the time periods specified in
the SEC rules and forms.

# IDENTIFICATION OF THE
AUDIT COMMITTEE

The
Registrant has a standing audit committee established in accordance with Section
3(a)(58)(A) of the Securities Exchange Act of 1934. The members of the Registrants
audit committee are Alan D. Horn, James D. Fleck, John E. Caldwell and Robert A. Young.

# AUDIT COMMITTEE
FINANCIAL EXPERT

The
Registrants board of directors has determined that it has at least one audit
committee financial expert serving on its audit committee. The board of directors has
determined that each of Mr. Alan D. Horn and John E. Caldwell is an audit committee
financial expert and is independent, as that term is defined by the National Association
of Securities Dealers, Inc.s corporate governance standards applicable to the
Registrant. The SEC has indicated that the designation of a person as an audit committee
financial expert does not impose on such person any duties, obligations or liability that
are greater than those imposed on such person as a member of the audit committee and the
board of directors in the absence of such designation or identification and does not
affect the duties, obligations or liability of any other member of the audit committee or
board of directors.

# CODE OF ETHICS

The
Registrant has adopted a code of ethics entitled ATI Code of Ethics. The ATI
Code of Ethics applies to all directors, officers and employees of the Registrant,
including the Registrants principal executive officer, principal financial officer
and principal accounting officer. The ATI Code of Ethics was filed as an exhibit to the
Registrants Form 40-F filed with the SEC on January 20, 2004 and has not been
amended since that date.

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# PRINCIPAL ACCOUNTANT
FEES AND SERVICES

KPMG
LLP billed the following fees in each of the fiscal years ended August 31, 2005 and 2004
for professional services rendered to the Registrant:

|Fees                  |  | 2005          |  | 2004          | 
|--------------------- |  | ------------- |  | ------------- | 
|                     
|Audit Fees(1)         |  | $     699,000 |  | $     577,000 | 
|Audit-Related Fees(2) |  | 169,000       |  | 93,000        | 
|Tax Fees(3)           |  | 357,000       |  | 190,000       | 
|All Other Fees(4)     |  | 9,000         |  | 420,000       | 
|                     
|Total                 |  | $1,234,000    |  | $1,280,000    | 
|                     

|(1) |  | Audit
fees comprise professional services for the audit of the Registrants annual
financial statements, interim review procedures performed in connection with the
Registrants quarterly reports, and services normally provided in connection with
the Registrants statutory and regulatory filings which includes the audit of the
tax provision and fees for accounting consultation and statutory audits of subsidiaries.
|--- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) |  | Audit-Related Fees include fees associated with other accounting advisory and
assistance services such as due diligence assistance, accounting consultation on proposed
transactions and SOX advisory services.
|--- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) |  | Tax Fees comprise amounts
paid for tax services including tax compliance, tax advice and tax planning.
|--- |  | ------------------------------------------------------------------------------------------------------

|(4) |  | All Other Fees comprise amounts paid relating to services other than those reported
in the other categories above.
|--- |  | ------------------------------------------------------------------------------------------------------------------

# AUDIT COMMITTEE
PRE-APPROVAL POLICIES AND PROCEDURES

The
Registrants Board of Directors, upon the recommendation of the Audit Committee, has
adopted a written policy on auditor independence (the Policy). Under the
Policy, except in very limited circumstances, all audit and permitted non-audit services
are required to be pre-approved by the Audit Committee. The Policy prohibits the auditors
from providing the following types of non-audit services:

 bookkeeping or
other services related to the accounting records or financial statements of the Registrant;
 financial information systems design and implementation;
 appraisal or valuation services, fairness opinion, or contribution-in-kind reports;
 actuarial services;
 internal audit outsourcing services;
 management functions or human resources services;
 broker or dealer, investment advisor or investment banking services on behalf of the Registrant; and
 legal services and expert services unrelated to the audit.

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The Policy also permits the auditors
to provide other types of non-audit services, including tax services, but only if approved
in advance by the Audit Committee, subject to limited exceptions.

None
of the services described above under Principal Accountant Fees and Services
under the captions Audit-Related Fees, Tax Fees and All
Other Fees were approved by the Audit Committee pursuant to paragraph(c)(7)(i)(C) of
Rule 2-01 of Regulation S-X.

# OFF-BALANCE SHEET
ARRANGEMENTS

The
disclosure provided under Note 1(q)  Financial Instruments and
Note 2  Financial Instruments of the Notes to Consolidated
Financial Statements on pages 71 and 72 of Exhibit 2, Comparative Consolidated Financial
Statements, is incorporated by reference herein.

# CONTRACTUAL COMMITMENTS

The
disclosure provided under Liquidity and Capital Resources  Commitments
on page 112 of Exhibit 3, Managements Discussion and Analysis of Operating Results and
Financial Position, is incorporated by reference herein.

# OTHER INFORMATION

Pursuant
to Rule 4350(a)(i) of the Nasdaq Stock Market, Inc. (NASDAQ) Market Rules, the
Registrant relies on the following exemptions:

| | (1) | an exemption from Rule 4350(f) of the Marketplace Rules granted to the
          Registrant in connection with its initial listing on the NASDAQ in 1998,
          requiring that each Nasdaq-quoted company have in place a minimum quorum
          requirement for shareholder meetings of 33 1/3% of the outstanding shares of the
          companys voting common stock. In accordance with the provisions of section
          139(1) of the Canada Business Corporations Act (the CBCA), the
          Registrants by-laws provide that a quorum is met if holders of at least 5%
          of the votes eligible to be cast at a meeting are present or represented by
          proxy at a shareholder meeting. The Registrant understands that it is not
          unusual for a similar quorum requirement to be found in the by-laws of other
          publicly-traded corporations subject to the CBCA; and
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (2) | an exemption from Rule 4350(i)(1)(A) of the Marketplace Rules granted to the
          Registrant on February 18, 2005, requiring that each Nasdaq-quoted company
          obtain shareholder approval of certain amendments to equity compensation plans.
          The exemption was granted to the Registrant in connection with the following
          amendments made to its share option plan (the Plan): (i) setting
          forth additional terms and conditions for the Registrants employees in
          India; (ii) reducing the maximum term of future options to 7 years from 10
          years; (iii) allowing unvested options to vest immediately upon the death of a
          participant; (iv) allowing, in the Registrants discretion, continued
          vesting of a participants options upon termination of employment other
          than for cause; and (v) allowing the Registrants board of directors to
          establish an exercise price for an option that is greater than the then current
          fair market price for the Registrants common shares (collectively, the
          Amendments). Under Canadian law, the Amendments to the Plan do not
          require shareholder approval. In addition, on November 19, 2004, the Toronto
          Stock Exchange (the TSX) confirmed that there is no requirement
          under the rules of the TSX that the Registrants shareholders approve the
          Amendments to the Plan. The Registrant understands that it is not unusual for
          other corporations with securities listed on the TSX to make similar amendments
          to their share option plans without shareholder approval.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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# UNDERTAKING AND CONSENT
TO SERVICE OF PROCESS

| | A. | Undertaking
| | -- | -----------

| | The
Registrant hereby undertakes to make available, in person or by telephone,
representatives to respond to inquiries made by the SEC staff, and to furnish promptly,
when requested to do so by the SEC staff, information relating to the securities in
relation to which the obligation to file an annual report on Form 40-F arises, or to
transactions in said securities.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | B. | Consent
to Service of Process
| | -- | -----------------------------

| | The
Registrant has previously filed with the SEC a Form F-X in connection with the Common
Shares.
| | -------------------------------------------------------------------------------------------------

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# SIGNATURES

Pursuant
to the requirements of the Exchange Act, the Registrant certifies that it meets all of the
requirements for filing on Form 40-F and has duly caused this Annual Report to be
signed on its behalf by the undersigned, thereunto duly authorized.

| |  | ATI TECHNOLOGIES INC.                 | 
| |  | ------------------------------------- | 
| |  |                                       | 
| |  |                                       | 
| |  |                                       | 
| |  | /s/ David Orton                       | 
| |  | David Orton                           | 
| |  | President and Chief Executive Officer | 

Date: November 22, 2005

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Page 7 of 126

# EXHIBIT INDEX

|    |  | SequentialPage No.                                                                                                                                                                                                                                                                                                                                                                                                       
|--- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|1.  |  | Annual Information Form dated as of November 15, 2005.                                                                                                                                                                                                                                                                                                                                                                   
|   
|2.  |  | Comparative consolidated financial statements for the three-year period ended
August 31, 2005, together with the auditors report thereon.                                                                                                                                                                                                                                                                               
|   
|3.  |  | Managements Discussion and Analysis of Operating Results and Financial Position for
the three-year period ended August 31, 2005.                                                                                                                                                                                                                                                                                        
|   
|4.  |  | The information contained in the section titled Statement of Corporate Governance
Practices and in Schedule F titled Compliance with TSX Guidelines in the Registrants Management Information Circular, dated
December 14, 2004, in connection with the annual meeting of shareholders held on January 25, 2005 (incorporated by reference to the
Registrants Form 6-K furnished to the SEC on December 23, 2004).*
|   
|5.  |  | Consent of KPMG LLP, Chartered Accountants, dated October 4, 2005.                                                                                                                                                                                                                                                                                                                                                       
|   
|6.  |  | Certificate of David Orton required by Rule 13a-14(a) or Rule 15d-14(a), pursuant to
Section 302 of Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                          
|   
|7.  |  | Certificate of Patrick Crowley required by Rule 13a-14(a) or Rule 15d-14(a), pursuant
to Section 302 of Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                      
|   
|8.  |  | Certificate of David Orton required pursuant to 18 U.S.C. Section 1350, as enacted
pursuant to Section 906 of Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                                
|   
|9.  |  | Certificate of Patrick Crowley required pursuant to 18 U.S.C. Section 1350, as
enacted pursuant to Section 906 of Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                                            
|   
|10. |  | ATI Code of Ethics (incorporated by reference to Exhibit 6 to the Registrants
Form 40-F (SEC File No. 000-29872) filed with the SEC on January 20, 2004).*                                                                                                                                                                                                                                                              

* Previously filed.