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
| Technology | DDR Maximum Rate [MT/s] | SAGV-LowBW | SAGV-MedBW | SAGV-HighBW | SAGV- MaxBW/ lowest latency |
---|
S-Processor | DDR4 | 3200 | 2133 G2 | 2666 G1 | 2933 G1 | 3200 G1 |
DDR5 1DPC | 4800 | 2000 G2 | 3600 G2 | 4400 G2 | 4800 G2 |
DDR5 1DPC on 2DPC | 4400 | 2000 G2 | 3600 G2 | 4000 G2 | 4400 G2 |
DDR5 2DPC 1R/1R | 4000 | 2000 G2 | 3600 G2 | 3600 G2 | 4000 G2 |
DDR5 2DPC 2R/2R | 3600 | 2000 G2 | 3200 G2 | 3200 G2 | 3600 G2 |
H-Processor | LPDDR4x | 4266 | 2666 G4 | 3733 G4 | 4266 G4 | 4266 G2 |
LPDDR5 1R/2R 3 | 5200 | 2400 G4 | 4800 G4 | 5200 G4 | 5200 G2 |
LPDDR5 1R/2R | 4800 | 2400 G4 | 4400 G4 | 4400 G4 | 4800 G2 |
DDR4 | 3200 | 2133 G2 | 2933 G2 | 3200 G2 | 2666 G1 |
DDR5 | 4800 | 2000 G2 | 3600 G4 | 4400 G2 | 4800 G2 |
P-Processor | LPDDR4x | 4266 | 2666 G4 | 3733 G4 | 4266G4 | 4266 G2 |
LPDDR5 1R/2R3 | 5200 | 2400 G4 | 4800 G4 | 5200 G4 | 5200 G2 |
LPDDR5 1R/2R | 4800 | 2400 G4 | 4400 G4 | 4400 G4 | 4800 G2 |
DDR4 | 3200 | 2133 G2 | 2933 G2 | 3200 G2 | 2666 G1 |
DDR5 | 4800 | 2000 G2 | 4400 G4 | 4800 G4 | 4800 G2 |
U15-Processor | LPDDR4x | 4266 | 2666 G4 | 3200 G4 | 3733 G4 | 4266 G4 |
LPDDR5 1R/2R3 | 5200 | 2400 G4 | 4800 G4 | 5200 G4 | 5200 G2 |
LPDDR5 1R/2R | 4800 | 2400 G4 | 4400 G4 | 4400 G4 | 4800 G2 |
DDR4 | 3200 | 2133 G2 | 2933 G2 | 3200 G2 | 2666 G1 |
DDR5 | 4800 | 2000 G2 | 4400 G2 | 4800 G4 | 4800 G2 |
U9-Processor | LPDDR4x | 4266 | 2666 G4 | 3200 G4 | 3733 G4 | 4266 G4 |
LPDDR5 1R/2R | 5200 | 2200 G4 | 3600 G4 | 4800 G4 | 5200 G4 |
- 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 - Type 4 board only.
- SAGV is not supported on S 125W Processors.
- SA-GV modes
- 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.
- MedBW - Tuned for balance between power & performance
- HighBW Characterized by high power, low latency, moderate BW also used as RFI mitigation point.
- MaxBW/ lowest latency Lowest Latency point, low BW and highest power.
|