Intel® Core™ Ultra Processors for H-series and U-series Platforms CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 795258 | 12/14/2023 | Public |
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Roundtrip Latency (SC_Roundtrip_latency_0_0_0_MCHBAR) – Offset e020
Read Round-trip latency per rank
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 63:32 | 0h | RO | Reserved |
| 31:24 | 19h | RW | Rank 3 latency (Rank_3_latency) Latency from read command to rank 3 until first data chunk return to MC in QCLK cycles |
| 23:16 | 19h | RW | Rank 2 latency (Rank_2_latency) Latency from read command to rank 2 until first data chunk return to MC in QCLK cycles |
| 15:8 | 19h | RW | Rank 1 latency (Rank_1_latency) Latency from read command to rank 1 until first data chunk return to MC in QCLK cycles |
| 7:0 | 19h | RW | Rank 0 latency (Rank_0_latency) Latency from read command to rank 0 until first data chunk return to MC in QCLK cycles |