Signal amplitude and clock signal frequency selection

An apparatus comprising:

• circuitry that is capable of, in response, at least in part, to receipt at a first node of a request issued from a second node to change from one mode of operation to another mode of operation:
• selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation, the amplitude of the signal being different from another amplitude of the signal during the one mode of operation;
• and
• selecting a frequency of a clock signal to be supplied in the first node during the another mode of operation, the frequency being different from another frequency of the clock signal during the one mode of operation.

A memory having stored thereon instructions that when executed by a machine result in the following:

• in response, at least in part, to receipt at a first node of a request issued from a second node to change from one mode of operation to another mode of operation:
• selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation, the amplitude of the signal being different from another amplitude of the signal during the one mode of operation;
• and
• selecting a frequency of a clock signal to be supplied in the first node during the another mode of operation, the frequency being different from another frequency of the clock signal during the one mode of operation.

A system comprising:

• a first node comprising circuitry that includes a circuit card and a circuit board, the circuit board including a circuit card slot that is capable of coupling the circuit card to the circuit board;
• and
• a second node;
• the circuitry being capable of, in response, at least in part, to receipt at the first node of a request issued from a second node to change from one mode of operation to another mode of operation:
• selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation, the amplitude of the signal being different from another amplitude of the signal during the one mode of operation;
• and
• selecting a frequency of a clock signal to be supplied in the first node during the another mode of operation, the frequency being different from another frequency of the clock signal during the one mode of operation.