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Processor Uncore Configuration Registers
132
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
13.2.4.11 DIMM_TEMP_TH_[0:2]
13.2.4.12 DIMM_TEMP_THRT_LMT_[0:2]
All three THRT_CRIT, THRT_HI and THRT_MID are per DIMM BW limit, that is, all 
activities (ACT, READ, WRITE) from all ranks within a DIMM are tracked together in one 
DIMM activity counter. 
Type:
CFG
PortID: N/A
Bus:
1
Device: 16
Function:
0,1,4,5
Bus:
1
Device: 30
Function:
0,1,4,5
Offset:
0x120, 0x124, 0x128
Bit
Attr
Default
Description
31:27
RV
-
Reserved.
26:24
RW
0x0
TEMP_THRT_HYST (temp_thrt_hyst):
Positive going Threshold Hysteresis Value. Set to 00h if sensor does not support 
positive-going threshold hysteresis. This value is subtracted from 
TEMP_THRT_XX to determine the point where the asserted status for that 
threshold will clear.
23:16
RW
0x5f
TEMP_HI (temp_hi):
TCase threshold at which to Initiate THRTCRIT and assert THERMTRIP# valid 
range: 32 to 127°C. Note: the default value is listed in decimal.
FF: Disabled
Others: reserved.
TEMP_HI should be programmed so it is greater than TEMP_MID
15:8
RW
0x5a
TEMP_MID (temp_mid):
TCase threshold at which to Initiate THRTHI and assert valid range: 32 to 
127°C.
Note: the default value is listed in decimal.
FF: Disabled
Others: reserved.
TEMP_MID should be programmed so it is less than TEMP_HI
7:0
RW
0x55
TEMP_LO (temp_lo):
TCase threshold at which to Initiate 2x refresh and/or THRTMID and initiate 
Interrupt (MEMHOT#).
Note: the default value is listed in decimal.valid range: 32 to 127°C.
FF: Disabled
Others: reserved.
TEMP_LO should be programmed so it is less than TEMP_MID
Type:
CFG
PortID: N/A
Bus:
1
Device: 16
Function:
0,1,4,5
Bus:
1
Device: 30
Function:
0,1,4,5
Offset:
0x130, 0x134, 0x138
Bit
Attr
Default
Description
31:24
RV
-
Reserved.