CHAPTER 3

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Memory and I/O Power Management

CPUs cannot operate effectively without memory to store working data and I/O interfaces to bring in data from drives and the network. Although the CPU is a common focus for power management and power efficiency discussions, in many systems the memory subsystem can contribute a significant power footprint. I/O is also important but tends to contribute a much smaller piece of the pie. This chapter will provide an overview of server memory architecture and how the power and thermal management techniques work. It will also discuss how power is managed for the other I/Os that provide the CPU with the data ...

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