Intel System Agent Enhanced SpeedStep ® Technology

Intel System Agent Enhanced SpeedStep ® Technology also known as SAGV (System Agent Geyserville) is a dynamic voltage frequency scaling of the System Agent clock based on memory utilization. Unlike processor core and package Enhanced Intel SpeedStep ® Technology, System Agent Enhanced SpeedStep ® Technology has three valid operating points. When running light workload and Intel System Agent Enhanced SpeedStep ® Technology is enabled, the DDR data rate may change as follows:

BIOS/MRC DDR training at maximum, mid and minimum frequencies sets I/O and timing parameters.

In order to achieve the optimal levels of performance and power, the memory initialization and training process performed during first system boot or after CMOS clear or after a BIOS update will take a longer time than a typical boot. During this initialization and training process, end users may see a blank screen. More information on the memory initialization process can be found in the industry standard JEDEC Specifications found on www.JEDEC.org.

Before changing the DDR data rate, the processor sets DDR to self-refresh and changes the needed parameters. The DDR voltage remains stable and unchanged.