13th Generation Intel® Core™, Intel® Core™ 14th Generation, Intel® Core™ Processor (Series 1) and (Series 2), Intel® Xeon™ E 2400 Processor and Intel® Xeon™ 6300 Processor

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.
Supporting Intel® Core™ 14th Generation Processor for S, HX formerly known As Raptor Lake Refresh.
Supporting Intel® Core™ Processor (Series 1) for U Processor Line Platform, formerly known As Raptor Lake refresh
Supporting Intel® Core™ Processor (Series 2) for H Processor Line Platform, formerly known As Raptor Lake Refresh.
Supporting Intel® Xeon® E 2400 Processor and Intel® Xeon® 6300 Processor, formerly known As Raptor Lake–E Refresh

ID Date Version Classification
743844 02/28/2025 Public

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Document Table of Contents

User Mode Wait Instructions

The UMONITOR and UMWAIT are user mode (Ring 3) instructions similar to the supervisor mode (Ring 0) MONITOR/MWAIT instructions without the C-state management capability.

TPAUSE us an enhanced PAUSE instruction.

The mnemonics for the three new instructions are:

  • UMONITOR: operates just like MONITOR but allowed in all rings.
  • UMWAIT: allowed in all rings, and no specification of target C-state.
  • TPAUSE: similar to PAUSE but with a software-specified delay. Commonly used in spin loops.