Intel® Core™ Ultra 200H and 200U Series Processors CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 844345 | 01/29/2025 | 001 | Public |
Rank Temperature (RANK_TEMPERATURE_0_0_0_MCHBAR) – Offset e424
This register holds the latest MR temperature read per rank and is used to determine the required refresh rate and thermal conditions of the DRAMs.
It should be noted if the register DDR5_1DPC_split_ranks_across_subch is set then: rank_0 -- holds rank0 temperature and rank_3 holds rank1 temperature.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:24 | 9h | RW/V | Subchannel 1 Rank 1 Temperature (SCH1_RANK1_TEMP) DIMM/Subchannel 1 Rank 1 Refresh Rate. Default is set to LPDDR5 1x refresh rate. |
| 23:16 | 9h | RW/V | Subchannel 1 Rank 0 Temperature (SCH1_RANK0_TEMP) DIMM/Subchannel 1 Rank 0 Refresh Rate. Default is set to LPDDR5 1x refresh rate. |
| 15:8 | 9h | RW/V | Subchannel 0 Rank 1 Temperature (SCH0_RANK1_TEMP) DIMM/Subchannel 0 Rank 1 Refresh Rate. Default is set to LPDDR5 1x refresh rate. |
| 7:0 | 9h | RW/V | Subchannel 0 Rank 0 Temperature (SCH0_RANK0_TEMP) DIMM/Subchannel 0 Rank 0 Refresh Rate. Default is set to LPDDR5 1x refresh rate. |