Silicon Graphics International Corp Watch

from S-3 111 pages Silicon Graphics International Corp. Issuer and Trustee Indenture Dated as of , 201 Subordinated Debt Securities

from S-3 102 pages Silicon Graphics International Corp. Issuer and Trustee Indenture Dated as of , 201 Senior Debt Securities

from 8-K 2 pages Common Stock Number Rsi-0201 Common Stock Shares Cusip 82706l 10 8 See Reverse for Certain Definitions Rackable Systems, Inc. Incorporated Under the Laws of the State of Delaware This Certifies That Specimen Is the Record Holder of Fully Paid and Non-Assessable Shares of Common Stock, $0.001 Par Value Per Share, of Rackable Systems, Inc. Transferable on the Books of the Corporation in Person or by Duly Authorized Attorney Upon Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Until Countersigned by the Transfer Agent and Registered by the Registrar. Witness the Facsimile Seal of the Corporation and the Facsimile Signatures of Its Duly Authorized Officers. Dated: Secretary Rackable Systems, Inc. Incorporated 2002 Delaware President and Chief Executive Officer Countersigned and Registered: American Stock Transfer & Trust Company (New York, New York) by Transfer Agent and Registrar Authorized Signature Name Changed to Silicon Graphics International Corp. Midwest Bank Note Co Rackable Systems, Inc

from S-1/A 2 pages Common Stock Number Rsi-0001 Rackable® Systems Rackable Systems, Inc. Number Rsi-0001 Incorporated Under the Laws of the State of Delaware Common Stock Shares Cusip 750077 10 9 See Reverse for Certain Definitions This Certifies That Is the Record Holder of Fully Paid and Non-Assessable Shares of Common Stock, $0,001 Par Value Per Share, of Rackable Systems, Inc. Transferable on the Books of the Corporation in Person or by Duly Authorized Attorney Upon Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Until Countersigned by the Transfer Agent and Registered by the Registrar. Witness the Facsimile Seal of the Corporation and the Facsimile Signatures of Its Duly Authorized Officers. Dated: Secretary President and Chief Executive Officer Rackable Systems, Inc. Incorporated 2002 Delaware Countersigned and Registered: American Stock Transfer & Trust Company (New York, New York) Transfer Agent and Registrar by Authorized Signature