35-90 Vol. 3C

MODEL-SPECIFIC REGISTERS (MSRS)

47:40

Package

Maximum Ratio Limit for Active cores in Group 5
Maximum turbo ratio limit when number of active cores is less or 

equal to Group 5 threshold and greater than Group 4 threshold. 

55:48

Package

Maximum Ratio Limit for Active cores in Group 6
Maximum turbo ratio limit when number of active cores is less or 

equal to Group 6 threshold and greater than Group 5 threshold. 

63:56

Package

Maximum Ratio Limit for Active cores in Group 7
Maximum turbo ratio limit when number of active cores is less or 

equal to Group 7 threshold and greater than Group 6 threshold. 

1AEH

430

MSR_TURBO_GROUP_CORE

CNT

Package

Group Size of Active Cores for Turbo Mode Operation (RW)
Writes of 0 threshold is ignored

7:0

Package

Group 0 Core Count Threshold
Maximum number of active cores to operate under Group 0 Max 

Turbo Ratio limit. 

15:8

Package

Group 1 Core Count Threshold
Maximum number of active cores to operate under Group 1 Max 

Turbo Ratio limit. Must be greater than Group 0 Core Count.

23:16

Package

Group 2 Core Count Threshold
Maximum number of active cores to operate under Group 2 Max 

Turbo Ratio limit. Must be greater than Group 1 Core Count.

31:24

Package

Group 3 Core Count Threshold
Maximum number of active cores to operate under Group 3 Max 

Turbo Ratio limit. Must be greater than Group 2 Core Count.

39:32

Package

Group 4 Core Count Threshold
Maximum number of active cores to operate under Group 4 Max 

Turbo Ratio limit. Must be greater than Group 3 Core Count.

47:40

Package

Group 5 Core Count Threshold
Maximum number of active cores to operate under Group 5 Max 

Turbo Ratio limit. Must be greater than Group 4 Core Count.

55:48

Package

Group 6 Core Count Threshold
Maximum number of active cores to operate under Group 6 Max 

Turbo Ratio limit. Must be greater than Group 5 Core Count.

63:56

Package

Group 7 Core Count Threshold
Maximum number of active cores to operate under Group 7 Max 

Turbo Ratio limit. Must be greater than Group 6 Core Count and not 

less than the total number of processor cores in the package. E.g. 

specify 255.

1C8H

456

MSR_LBR_SELECT

Core

Last Branch Record Filtering Select Register (R/W) 
See Section 17.7.2, “Filtering of Last Branch Records.”

0

CPL_EQ_0

1

CPL_NEQ_0

2

JCC

3

NEAR_REL_CALL

Table 35-12.   MSRs in Next Generation Intel Atom Processors Based on the Goldmont Microarchitecture (Contd.)

Address

Register Name

Scope

Bit Description

 Hex

Dec