Vol. 3C 35-155

MODEL-SPECIFIC REGISTERS (MSRS)

3FAH

1018

MSR_PKG_C7_RESIDENCY

Package

Note: C-state values are processor specific C-state code names, 

unrelated to MWAIT extension C-state parameters or ACPI C-

States.

63:0

Package C7 Residency Counter. (R/O)
Value since last reset that this package is in processor-specific C7 

states. Count at the same frequency as the TSC.

3FCH

1020

MSR_CORE_C3_RESIDENCY

Core

Note: C-state values are processor specific C-state code names, 

unrelated to MWAIT extension C-state parameters or ACPI C-

States.

63:0

CORE C3 Residency Counter. (R/O)
Value since last reset that this core is in processor-specific C3 

states. Count at the same frequency as the TSC.

3FDH

1021

MSR_CORE_C6_RESIDENCY

Core

Note: C-state values are processor specific C-state code names, 

unrelated to MWAIT extension C-state parameters or ACPI C-

States.

63:0

CORE C6 Residency Counter. (R/O)
Value since last reset that this core is in processor-specific C6 

states. Count at the same frequency as the TSC.

3FEH

1022

MSR_CORE_C7_RESIDENCY

Core

Note: C-state values are processor specific C-state code names, 

unrelated to MWAIT extension C-state parameters or ACPI C-

States.

63:0

CORE C7 Residency Counter. (R/O)
Value since last reset that this core is in processor-specific C7 

states. Count at the same frequency as the TSC.

400H

1024

IA32_MC0_CTL

Core

See Section 15.3.2.1, “IA32_MCi_CTL MSRs.”

401H

1025

IA32_MC0_STATUS

Core

See Section 15.3.2.2, “IA32_MCi_STATUS MSRS,” and Chapter 16.

402H

1026

IA32_MC0_ADDR

Core

See Section 15.3.2.3, “IA32_MCi_ADDR MSRs.”

403H

1027

IA32_MC0_MISC

Core

See Section 15.3.2.4, “IA32_MCi_MISC MSRs.”

404H

1028

IA32_MC1_CTL

Core

See Section 15.3.2.1, “IA32_MCi_CTL MSRs.”

405H

1029

IA32_MC1_STATUS

Core

See Section 15.3.2.2, “IA32_MCi_STATUS MSRS,” and Chapter 16.

406H

1030

IA32_MC1_ADDR

Core

See Section 15.3.2.3, “IA32_MCi_ADDR MSRs.”

407H

1031

IA32_MC1_MISC

Core

See Section 15.3.2.4, “IA32_MCi_MISC MSRs.”

408H

1032

IA32_MC2_CTL

Core

See Section 15.3.2.1, “IA32_MCi_CTL MSRs.”

409H

1033

IA32_MC2_STATUS

Core

See Section 15.3.2.2, “IA32_MCi_STATUS MSRS,” and Chapter 16.

40AH

1034

IA32_MC2_ADDR

Core

See Section 15.3.2.3, “IA32_MCi_ADDR MSRs.”

40BH

1035

IA32_MC2_MISC

Core

See Section 15.3.2.4, “IA32_MCi_MISC MSRs.”

40CH

1036

IA32_MC3_CTL

Core

See Section 15.3.2.1, “IA32_MCi_CTL MSRs.”

40DH

1037

IA32_MC3_STATUS

Core

See Section 15.3.2.2, “IA32_MCi_STATUS MSRS,” and Chapter 16.

40EH

1038

IA32_MC3_ADDR

Core

See Section 15.3.2.3, “IA32_MCi_ADDR MSRs.”

40FH

1039

IA32_MC3_MISC

Core

See Section 15.3.2.4, “IA32_MCi_MISC MSRs.”

Table 35-18.  MSRs Supported by Intel® Processors 

based on Intel® microarchitecture code name Sandy Bridge (Contd.)

Register 

Address

Register Name

Scope

Bit Description

 Hex

Dec