Intel Xeon L3406 CM80616005010AA User Manual
Product codes
CM80616005010AA
Datasheet, Volume 2
273
Processor Uncore Configuration Registers
4.13.5
MC_THERMAL_PARAMS_B0
MC_THERMAL_PARAMS_B1
Parameters used by the thermal throttling logic.
4.13.6
MC_COOLING_COEF0
MC_COOLING_COEF1
Heat removed from DRAM 8 DCLKs. This should be scaled relative to the per command
weights and the initial value of the throttling threshold. This includes idle command and
refresh energies. If 2X refresh is supported, the worst case of 2X refresh must be
assumed.
weights and the initial value of the throttling threshold. This includes idle command and
refresh energies. If 2X refresh is supported, the worst case of 2X refresh must be
assumed.
When there are more than 4 ranks attached to the channel, the thermal throttle logic is
shared.
shared.
Device:
4, 5
Function:
3
Offset:
64h
Access as a DWord
Bit
Attr
Default
Description
31:26
RW
1
SAFE_INTERVAL
Safe values for cooling coefficient and duty cycle will be applied while the
Safe values for cooling coefficient and duty cycle will be applied while the
SAFE_INTERVAL is exceeded. This interval is the number of ZQ intervals
since the last time the MC_COOLING_COEF or MC_CLOSED_LOOP registers
have been written. A register to write to MC_COOLING_COEF or
MC_CLOSED_LOOP will re-apply the normal MC_COOLING_COEF and
MC_CLOSED_LOOP.MIN_THROTTLE_DUTY_CYC values. The register value
written need not be different; writing the current value will suffice. The
MC_THERMAL_STATUS.CYCLES_THROTTLED field is reloaded when the
number of ZQ intervals exceeds this value. This field must not be
programmed to 0; this value is invalid.
25:16
RW
255
SAFE_DUTY_CYC
This value replaces MC_CLOSED_LOOP.MIN_THROTTLE_DUTY_CYC while the
This value replaces MC_CLOSED_LOOP.MIN_THROTTLE_DUTY_CYC while the
MC_THERMAL_PARAMS_B.SAFE_INTERVAL is exceeded.
15:8
RW
1
SAFE_COOL_COEF
This value replaces MC_COOLING_COEF while the
This value replaces MC_COOLING_COEF while the
THERMAL_PARAMS_B.SAFE_INTERVAL is exceeded.
7:0
RW
0
ACTCMD_ENERGY
Energy of an Activate/Precharge Cycle.
Energy of an Activate/Precharge Cycle.
Device:
4, 5
Function:
3
Offset:
80h
Access as a DWord
Bit
Attr
Default
Description
31:24
RW
255
RANK3. Rank 3 Cooling Coefficient.
23:16
RW
255
RANK2. Rank 2 Cooling Coefficient.
15:8
RW
255
RANK1. Rank 1 Cooling Coefficient.
7:0
RW
255
RANK0. Rank 0 Cooling Coefficient.