CPUID

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Export map as:

Research this topic

Explore the main themes, entities and connections around CPUID. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

EAX=0: Highest Function Parameter and Manufacturer ID

ASCII UMC AMD Cyrix STMicroelectronics

30 related topics

CPU-specific information outside x86

ARM architectures Exception level System/370 Z/Architecture MIPS32/64

11 related topics

History

Machine code Motorola 68000 series Motorola 68010 68000

4 related topics

EAX=4000'0000h-4FFFF'FFFh: Reserved for Hypervisors

Hypervisors Intel VT-x or AMD-v virtualization Hyper-V QEMU KVM

6 related topics

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

X86
Opcode
Processor supplementary instruction
CPU Central processing unit
Intel
Pentium
Late 486 I486
MMX MMX (instruction set)
SSE Streaming SIMD Extensions

History

Calling CPUID

EFLAGS register FLAGS register
Assembly language
Model-specific registers Model-specific register
Windows NT 4.0

EAX=0: Highest Function Parameter and Manufacturer ID

ASCII
UMC United Microelectronics Corporation
AMD Advanced Micro Devices
Cyrix
STMicroelectronics
IBM
NexGen
Centaur Centaur Technology
IDT Integrated Device Technology
VIA VIA Technologies
Zhaoxin
Rise Rise Technology
SiS Silicon Integrated Systems
Transmeta
National Semiconductor
Vortex86
Hygon AMD–Chinese joint venture
AMD K5
Soft CPU cores Soft microprocessor
MCST Elbrus Elbrus (computer)
E2k Elbrus 2000
Dynamic binary translation
Motherboard
Virtual PC
Apple Rosetta 2 Rosetta (software)
RealPC
SoftWindows
FX!32
DEC Alpha
PC-98

EAX=1: Processor Info and Feature Bits

Stepping Stepping (version numbers)
Microarchitecture
Codename
Errata

EAX=2: Cache and TLB Descriptor Information

TLB Translation Lookaside Buffer
Page Page (computer memory)
Set-associative Cache placement policies

EAX=3: Processor Serial Number

EAX=4 and EAX=8000'001Dh: Cache Hierarchy and Topology

EAX=4 and EAX=Bh: Intel Thread/Core and Cache Topology

X2APIC
SMT Simultaneous multithreading
Westmere Westmere (microarchitecture)
Hyperthreading
Wildfire Games

EAX=0Dh: XSAVE Features and State Components

EAX=12h: SGX Capabilities

Software Guard Extensions

EAX=14h: Processor Trace

Processor Trace Branch trace

EAX=15h and EAX=16h: CPU, TSC, Bus and Core Crystal Clock Frequencies

Time Stamp Counter
Skylake Skylake (microarchitecture)
APIC Advanced Programmable Interrupt Controller

EAX=17h: SoC Vendor Attribute Enumeration

IP core Semiconductor intellectual property core
System on chip
UTF-8
Null-terminated Null-terminated string

EAX=18h: TLB Hierarchy and Topology

Translation lookaside buffers Translation lookaside buffer

EAX=1Eh: Intel AMX Tile Multiplier (TMUL) Information

AMX Advanced Matrix Extensions

EAX=21h: Reserved for TDX enumeration

Trust Domain Extensions

EAX=2000'0000h: Highest Xeon Phi Function Implemented

Xeon Phi

EAX=4000'0000h-4FFFF'FFFh: Reserved for Hypervisors

Hypervisors Hypervisor
Intel VT-x or AMD-v virtualization X86 virtualization
Hyper-V
QEMU
KVM Kernel-based Virtual Machine
Xen

EAX=8000'0001h: Extended Processor Info and Feature Bits

EAX=8FFF'FFFEh and EAX=8FFF'FFFFh: AMD Easter Eggs

Easter egg Easter egg (media)
DEI House system at the California Institute of Technology

EAX=C000'0000h: Highest Centaur Extended Function

WinChip

EAX=C000'0001h: Centaur Feature Information

VIA/Zhaoxin PadLock VIA PadLock

EAX=C000'0002h: Centaur Extended CPUID Performance Data

VIA C7

CPUID usage from high-level languages

MSVC
FFI Foreign function interface
.NET

CPU-specific information outside x86

ARM architectures ARM architecture
Exception level Protection ring
System/370 IBM System/370
Z/Architecture
MIPS32/64 MIPS architecture
PowerPC
RISC-V
DSP Digital signal processor
Transputer
Texas Instruments
ASIC

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Nodes141

Edges140

Triples228

Avg. degree1.99

Density0.014184

Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

CPUID

Top relations

related to External links · 24

CPUID → AMD64 Architecture Programmer's Manual, Application Note, CLFLUSHOPT, Contains, CPUID Instruction, For, General-Purpose, IA-32 Architectures Software Developer's, Instruction Latency, Intel, Intel ISA, Intel Processor Identification, ISA, July, June, Linuxcpuprint, Manual, May, Memory Latency, Said

related to CPU-specific information outside x86 · 22

CPUID → Architecture, Architecture IBM, ARM, Configuration Registers, CPU, EL1, PrId, Processor Identification, Processor Version Register, PVR, Some, STFL, STFLE, STIDP, Store CPU ID, Store Facilities List, Store Facilities List Extended, System/370, The, The MIPS32/64

related to EAX=21h: Reserved for TDX enumeration · 16

CPUID → ASCII, CPU, EAX/EBX/ECX/EDX, EBX, ECX, EDX, ID, Intel's, IntelTDX, TD, TDX, TDX-specificTDCALLinstruction, This, Trust Domain, Trust Domain Extensions, When Intel TDX

related to EAX=3: Processor Serial Number · 14

CPUID → AMD CPUs, CPU, CPUs, Crusoe, EAX, ECX, EDX, For Intel Pentium III, Intel Pentium III, Processor Serial Number, PSN, The, This, Transmeta's Efficeon

related to EAX=4000'0000h-4FFFF'FFFh: Reserved for Hypervisors · 14

CPUID → AMD-v, CPUIDleaves40000000hto4FFFFFFFhare, EAX, EBX, ECX, EDX, For, Hv, Hyper-V, Hypervisors, ID, Intel VT-x, The, When

related to EAX=8000'0002h,8000'0003h,8000'0004h: Processor Brand String · 14

CPUID → AMD Ryzen, ASCII, CPU, CPUIDmust, DM, EAX, EBX, ECX, EDX, Intel/AMD, It, The, These, Vortex86DX3

related to EAX=2: Cache and TLB Descriptor Information · 13

CPUID → EAX, EAX/EBX/ECX/EDX, EBX, ECX, EDX, FFhindicates, On, The, There, These, This, TLB, TLBs

related to EAX=4 and EAX=8000'001Dh: Cache Hierarchy and Topology · 12

CPUID → AMD, CPU, EAX, EBX, ECX, EDX, In, Intel, Leaf4is, The, These, They

related to EAX=8FFF'FFFEh and EAX=8FFF'FFFFh: AMD Easter Eggs · 12

CPUID → Additionally, AMD K6 CPUs, DEI, Easter, EAX, EBX, ECX, EDX, FFFEh, FFFFh, Known Easter Egg, Several AMD CPU

related to EAX=4 and EAX=Bh: Intel Thread/Core and Cache Topology · 11

CPUID → Additional, Although, AMD, As, Bh, ECX, EDX, Intel, The, These, Unlike

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

eax information ecx processor leaf edx ebx intel processors cpu id returns feature amd returned string also return bits used

Entity relationships Subject–Predicate–Object triples

Subject	Predicate	Object	Confidence	Src
MMX/SSE are implemented	instance of	It was introduced by Intel in 1993 with the launch of the Pentium and late 486 processors.A program can use theCPUIDto determine processor type and whether features	0.80	text
CPUID	related to Calling CPUID	TheCPUIDopcode	0.60	section
CPUID	related to Calling CPUID	A2	0.60	section
CPUID	related to Calling CPUID	Processor	0.60	section
CPUID	related to Calling CPUID	ID	0.60	section
CPUID	related to Calling CPUID	EFLAGS	0.60	section
CPUID	related to Calling CPUID	In	0.60	section
CPUID	related to Calling CPUID	EAX	0.60	section
CPUID	related to Calling CPUID	In Intel's	0.60	section
CPUID	related to Calling CPUID	CPUIDshould	0.60	section
CPUID	related to Calling CPUID	CPU	0.60	section
CPUID	related to CPU-specific information outside x86	Some	0.60	section

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

Connections between topic areas Semantic bridges

Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

Min side: 3

Research this topic

Explore this topic

EAX=0: Highest Function Parameter and Manufacturer ID

CPU-specific information outside x86

History

EAX=4000'0000h-4FFFF'FFFh: Reserved for Hypervisors

Key facts & relationships

Topics to explore

Overview

History

Calling CPUID

EAX=0: Highest Function Parameter and Manufacturer ID

EAX=1: Processor Info and Feature Bits

EAX=2: Cache and TLB Descriptor Information

EAX=3: Processor Serial Number

EAX=4 and EAX=8000'001Dh: Cache Hierarchy and Topology

EAX=4 and EAX=Bh: Intel Thread/Core and Cache Topology

EAX=0Dh: XSAVE Features and State Components

EAX=12h: SGX Capabilities

EAX=14h: Processor Trace

EAX=15h and EAX=16h: CPU, TSC, Bus and Core Crystal Clock Frequencies

EAX=17h: SoC Vendor Attribute Enumeration

EAX=18h: TLB Hierarchy and Topology

EAX=1Eh: Intel AMX Tile Multiplier (TMUL) Information

EAX=21h: Reserved for TDX enumeration

EAX=2000'0000h: Highest Xeon Phi Function Implemented

EAX=4000'0000h-4FFFF'FFFh: Reserved for Hypervisors

EAX=8000'0001h: Extended Processor Info and Feature Bits

EAX=8000'0002h,8000'0003h,8000'0004h: Processor Brand String

EAX=8000'0007h: Processor Power Management Information and RAS Capabilities

EAX=8000'000Ah: SVM features

EAX=8C86'0000h: Hygon Extended Feature Flags

EAX=8FFF'FFFEh and EAX=8FFF'FFFFh: AMD Easter Eggs

EAX=C000'0000h: Highest Centaur Extended Function

EAX=C000'0001h: Centaur Feature Information

EAX=C000'0002h: Centaur Extended CPUID Performance Data

CPUID usage from high-level languages

CPU-specific information outside x86

Advanced semantic analysis

Map overview Semantic statistics

CPUID

How this topic connects Entity context

CPUID

Top relations

Important terminology Word statistics

Important terminology

Entity relationships Subject–Predicate–Object triples

Related concept clusters Concept neighborhoods

Connections between topic areas Semantic bridges