Datasheet

Datasheet 123

Bit Description

0111 = Similar to 0101 for Writes and when the Rank Thermal Sensor is tripped, DDR

SDRAM Throttling begins based on the setting in RTTC.

1000 = Only Rank Counter mechanism is enabled. When the threshold set in the GDT

field is reached, DDR SDRAM Throttling begins based on the setting in RCTC.

1001 = Rank Counter mechanism is enabled and GMCH Thermal Sensor based

throttling are both enabled. If GMCH Thermal Sensor is tripped, Write Throttling begins

based on the setting in WTTC. When the threshold set in the GDT field is reached, DDR

SDRAM Throttling begins based on the setting in RCTC.

1010 = Rank Thermal Sensor and Rank DDR SDRAM Counter mechanisms are both

enabled. If the rank DDR SDRAM Counter mechanism threshold is reached, DDR

SDRAM Throttling begins based on the setting in RCTC. If the external SO-DIMM

Thermal Sensor is tripped, DRAM Throttling begins based on the setting in RTTC.

1011 = Similar to 1010 and if the GMCH Thermal Sensor is tripped, Write Throttling

begins based on the setting in WTTC.

1111 = Rank and GMCH Thermal Sensor based Throttling and Rank and GMCH

Write Counter based Throttling are enabled. If both the Write Counter and GMCH

Thermal Sensor based mechanisms are tripped, DDR SDRAM Throttling begins based

on the setting allowed in WTTC. If both the Rank Counter and Rank Thermal Sensor

based mechanisms are tripped, DDR SDRAM Throttling begins based on the setting

allowed in RTTC.

27:24 Read Counter Based Power Throttle Control (RCTC): These bits select the Counter

based Power Throttle Bandwidth Limits for Read operations to system memory.

R/W, RO if Throttle Lock.

0h = 85%

1h = 70%

2h = 65%

3h = 60%

4h = 55%

5h = 50%

6h = 45%

7h = 40%

8h = 35%

9h = 30%

Ah = 20%

B-Fh = Reserved