Qlogic Corporation

Mark L Craven

Jerald K Alston

Henry Tran

An add-on card is provided for use within a computer system that has an expansion slot connected to a bus. The bus has a first supply line for supplying a first predetermined voltage and a second supply line for supplying a second predetermined voltage which is higher than the first predetermined voltage. The add-on card is adapted to operate properly regardless of whether the respective predetermined voltages are supplied on (1) the first supply line only, (2) the second supply line only, or (3) both supply lines. In a PCI bus implementation, where 3.3V and 5V are the predetermined voltage levels, the add-on card operates properly regardless of whether: only a 5V level is provided, only a 3.3V level is provided, or both 3.3V and 5V levels are provided.

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Laguna Hills, CA, United States of America

Mark L Craven