12th Generation Intel® Core™ Processors Datasheet, Volume 1 of 2


ID 655258
Date 28/10/2021 00:00:00
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SAGV Points

SAGV (System Agent Geyserville) is a way by which they SoC can dynamically scale the work point (V/F), by applying DVFS (Dynamic Voltage Frequency Scaling) based on memory bandwidth utilization and/or the latency requirement of the various workloads for better energy efficiency at System-Agent. Pcode heuristics are in charge of providing request for Qclock work points by periodically evaluating the utilization of the memory and IA stalls.

SA Speed Enhanced Speed Steps (SA-GV) and Gear Mode Frequencies


DDR Maximum Rate [MT/s]




SAGV- MaxBW/ lowest latency

S DDR4 3200 2133 G2 2666 G1 2933 G1 3200 G1
DDR5 1DPC 4800 2000 G2 3600 G2 4400 G2 4800 G2
  1. 12th Generation Intel® Core™ Processors supports dynamic gearing technology where the Memory Controller can run at 1:1 (Gear-1, Legacy mode) or 1:2 (Gear-2 mode) and 1:4 (Gear-4 mode) ratio of DRAM speed. The gear ratio is the ratio of DRAM speed to Memory Controller Clock.

    MC Channel Width equal to DDR Channel width multiply by Gear Ratio

  2. SA-GV modes
    1. LowBW- Low frequency point, Minimum Power point. Characterized by low power, low BW, high latency. The system will stay at this point during low to moderate BW consumption.
    2. MedBW - Tuned for balance between power & performance
    3. HighBW Characterized by high power, low latency, moderate BW also used as RFI mitigation point.
    4. MaxBW/ lowest latency Lowest Latency point, low BW and highest power.