Intel® Core™ Ultra Series 3 Processors CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872351 | 04/14/2026 | 001 | Public |
PM CONFIG THERM STATUS 0 0 0 MCHBAR (PM_CONFIG_THERM_STATUS_0_0_0_MCHBAR) – Offset e428
This register defines the configuration of the thermal/power management logic and also contains the per DIMM thermal status.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:30 | 0h | RO | Reserved |
| 29:14 | 0h | RW | MR4 PERIOD (MR4_PERIOD) Periodic MR4 read interval in tREFI |
| 13:11 | 7h | RW | MAX REF RATE (MAX_REF_RATE) This is the maximum refresh rate MC should enforce on a MC channel (both Sub channels) |
| 10:8 | 0h | RW | MIN REF RATE (MIN_REF_RATE) This is the minimum refresh rate MC should enforce on a MC channel (both Sub channels) |
| 7 | 0h | RW | DISABLE DRAM TS (DISABLE_DRAM_TS) When set, the Rank_Temperature_0_0_0_MCHBAR CR will NOT be updated when MC issues a read of DRAM temperature MR. This allows PCode to control refresh rates directly by managing the value in the Rank_Temperature_0_0_0_MCHBAR CR. |
| 6:0 | 0h | RO | Reserved |