13th Generation Intel® Core™ and Intel® Core™ 14th Generation Processors

Datasheet, Volume 1 of 2
Supporting 13th Generation Intel® Core™ Processor for S, H, P, HX, and U Processor Line Platforms, formerly known as Raptor Lake, Intel® Core™ 14th Generation Processor for S, HX, and U Processor Line Platform, formerly known as Raptor Lake Refresh and Intel® Xeon™ E 2400 Processor, formerly known As Raptor Lake–E

ID 743844
Date 03/25/2024
Document Table of Contents

Enhanced Intel SpeedStep® Technology

Enhanced Intel SpeedStep® Technology enables OS to control and select P-state. The following are the key features of Enhanced Intel SpeedStep® Technology:

  • Multiple frequencies and voltage points for optimal performance and power efficiency. These operating points are known as P-states.
  • Frequency selection is software controlled by writing to processor MSRs. The voltage is optimized based on the selected frequency and the number of active processors IA cores.
    • Once the voltage is established, the PLL locks on to the target frequency.
    • All active processor IA cores share the same frequency and voltage. In a multi-core processor, the highest frequency P-state requested among all active IA cores is selected.
    • Software-requested transitions are accepted at any time. If a previous transition is in progress, the new transition is deferred until the previous transition is completed.
  • The processor controls voltage ramp rates internally to ensure glitch-free transitions.

Note:Because there is low transition latency between P-states, a significant number of transitions per-second are possible.