Intel® Core™ Ultra Series 3 Processors CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872351 | 04/14/2026 | 001 | Public |
Intra-Channel 1 Decode Parameters (MAD_INTRA_CHANNEL_0_0_0_MCHBAR_1) – Offset d808
Holds information about the channel population. For DDR5, DIMM 0 maps to sub channel 0, DIMM 1 maps to sub channel 1. For LPDDR5 both sub channels require identical population
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:16 | 0h | RO | Reserved |
| 15 | 0h | RW | SubChannel/DIMM 1 Number of Ranks (SUBCH_1_RANKS) Sub channel 0 number of ranks |
| 14 | 0h | RW | Subchannel/DIMM 1 Device Width (SUBCH_1_WIDTH) Sub channel or DIMM 1 device width |
| 13:12 | 0h | RO | Reserved |
| 11:8 | 0h | RW | SubChannel/DIMM 1 Device Density (SUBCH_1_DENSITY) Sub channel or DIMM 1 device density |
| 7 | 0h | RW | SubChannel/DIMM 0 Number of Ranks (SUBCH_0_RANKS) Sub channel or DIMM 0 number of ranks |
| 6 | 0h | RW | SubChannel/DIMM 0 Device Width (SUBCH_0_WIDTH) Sub channel or DIMM 0 device width |
| 5:4 | 0h | RO | Reserved |
| 3:0 | 0h | RW | SubChannel/DIMM 0 Device Density (SUBCH_0_DENSITY) Sub channel or DIMM 0 device density |