how to change CPU supply voltage for IntelXeonCPUL5420?

how to change CPU supply voltage for IntelXeonCPUL5420?

For IntelXeonCPUL5420,
Via which command or system call can I change the voltage?
thank you

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Quoting - Lizhe Wang
For IntelXeonCPUL5420,
Via which command or system call can I change the voltage?
thank you

I feel its not possible because dealing with cpu voltage demands BIOS level interaction.

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