Speed Select Technology (SST) is a microprocessor power management technology introduced by Intel that allows for throughput and per-core performance configurations, allowing for the prioritization of performance for certain workloads running on specific cores by sacrificing the performance of other cores.

Overview

Speed Select Technology is a set of power management controls that allows a system administrator to customize per-core performance. By configuring the performance of specific cores and affinitizing workloads to those cores, higher software performance can be achieved. SST supports multiple types of customizations:

• Frequency Prioritization (SST-CP) - allows specific cores to clock higher by reducing the frequency of cores running lower-priority software.

• Speed Select Base Freq (SST-BF) - allows specific cores to run higher base frequency (P1) by reducing the base frequencies (P1) of other cores.

History

Speed Select Technology was introduced with Cascade Lake.

See also

• Frequency behavior of Intel processors