Exhibit 12.1

PMC-SIERRA, INC.

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES



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|------------------------------------------------------------------------- |  | ---------------- | ------- | - | ---------------- | - | ------ | ---------------- |  | - | ---------------- | - |  | ---------------------------- | ------- | - |  | - | -------- | -
|                                                                          |  | Year Ended       |        
|                                                                          |  | December 31,2006 |         |   | December 31,2005 |   |        | December 26,2004 |  |   | December 28,2003 |   |  | December 29,2002Restated (4) |        
|Earnings:                                                                 |  |                  |         |   |                  |   |        |                  |  |   |                  |   |  |                              |         |   |  |   |          |  
|(Loss) income before income taxes and before income from equity investees |  | $                | (50,655 | ) |                  | $ | 30,094 |                  |  | $ | 48,358           |   |  | $                            | (16,703 | ) |  | $ | (122,524 | )
|Fixed charges:                                                            |  |                  |         |   |                  |   |        |                  |  |   |                  |   |  |                              |         |   |  |   |          |  
|Interest expense and amortization of debt issuance costs                  |  |                  | 5,931   |   |                  |   | 1,571  |                  |  |   | 3,454            |   |  |                              | 10,547  |   |  |   | 12,104   |  
|Rental expense interest factor(2)                                         |  |                  | 3,503   |   |                  |   | 3,047  |                  |  |   | 3,083            |   |  |                              | 4,122   |   |  |   | 4,122    |  
|                                                                          |  |                  |         |   |                  |   |        |                  |  |   |                  |   |  |                              |         |   |  |   |          |  
|Total fixed charges                                                       |  |                  | 9,434   |   |                  |   | 4,618  |                  |  |   | 6,537            |   |  |                              | 14,669  |   |  |   | 16,226   |  
|                                                                          |  |                  |         |   |                  |   |        |                  |  |   |                  |   |  |                              |         |   |  |   |          |  
|Earnings (loss) available to cover fixed charges                          |  | $                | (41,221 | ) |                  | $ | 34,712 |                  |  | $ | 54,895           |   |  | $                            | (2,034  | ) |  | $ | (106,298 | )
|                                                                          |  |                  |         |   |                  |   |        |                  |  |   |                  |   |  |                              |         |   |  |   |          |  
|Ratio of earnings to fixed charges(3)                                     |  |                  |        |   |                  |   | 7.5    | x                |  |   | 8.4              | x |  |                              |        |   |  |   |         |  
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|(1) | The ratio of earnings to fixed charges was computed by dividing earnings by fixed charges for the periods indicated. Earnings consist of income (loss) before provision for income
taxes less income from equity investees plus fixed charges. Fixed charges consist of interest charges, amortization of debt issuance costs, and that portion of rental expense that the Company believes to be a reasonable approximation of the interest
factor included in rental expense.
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|(2) | The portion of operating lease rental expense that the Company believes to be a reasonable approximation of the interest factor is deemed to be one-third of total operating lease
rental expense.
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|(3) | Earnings were inadequate to cover fixed charges by $50.7 million, $16.7 million and $122.5 million for fiscal years ended December 31, 2006, December 28, 2003 and
December 29, 2002 respectively.
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|(4) | See Note 2 to the Consolidated Financial Statements.
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