12th Generation Intel® Core™ Processors Datasheet Volume 2 of 2
| ID | Date | Version | Classification |
|---|---|---|---|
| 767625 | 07/13/2023 | Public |
Channel 1 DIMM Characteristics (MAD_DIMM_CH1_0_0_0_MCHBAR) – Offset D810
This register defines the channel DIMM characteristics - number of DIMMs, number of ranks, size and type.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:30 | 0x0 | RW | Decoder Extended Bank Hashing (Decoder_EBH) Enable address decoder Extended bank hashing. |
| 29:28 | 0x1 | RW | BG0 Bit Options (BG0_bit_options) depending on value, BG[0] will be replaced with C[5] or C[6].DDR5: |
| 27:26 | 0x0 | RW | DIMM S Number of Ranks (DSNOR) DIMM S number of ranks |
| 25:24 | 0x0 | RW | DIMM S Width (DSW) Width of DDR chips |
| 23 | 0h | RO | Reserved |
| 22:16 | 0x0 | RW | DIMM S Size (DIMM_S_SIZE) Size of DIMM S in 0.5GB multiples. |
| 15:13 | 0h | RO | Reserved |
| 12 | 0x1 | RW | DDR5 DIMM L capacity 8Gb (ddr5_dl_8Gb) 0: DDR5 DIMM L capacity is more than 8Gb |
| 11 | 0x1 | RW | DDR5 DIMM S capacity 8Gb (ddr5_ds_8Gb) 0: DDR5 DIMM S capacity is more than 8Gb |
| 10:9 | 0x0 | RW | DIMM L Number of Ranks (DLNOR) 0: 1 Rank |
| 8:7 | 0x0 | RW | DIMM L Width (DLW) DIMM L width of DDR chips |
| 6:0 | 0x0 | RW | DIMM L Size (DIMM_L_SIZE) Size of DIMM L in 0.5GB multiples |