Memory
This menu displays and provides options to change the memory setting.
Item | Options | Description |
---|---|---|
System Memory Details | N/A | View the status of the system memory. |
ADDDC Sparing |
| Adaptive Double Device Data Correction (ADDDC) Sparing is a RAS function that provides more reliability of memory error correction in virtual lockstep mode. When the memory correctable error count reaches a pre-defined threshold, ADDDC will trigger virtual lockstep mode, which can significantly reduce performance. For high frequency, low latency, or low jitter workloads, Lenovo generally recommends disabling ADDDC sparing for high performance. ADDDC Sparing will not take effect if the system has x8 DIMMs or 9x4 value DIMMs or if memory is set to [Mirror mode] (Full or Partial). |
Page Policy |
| Page Policy setting determines whether the memory controller keeps the last accessed page open.
|
DDR MBIST |
| Enable or disable DDR Memory Built-In Self Test (MBIST). |
DRAM Post Package Repair |
| Enable or disable DRAM Post Package Repair (PRR). |
Memory Test |
| Enable or disable memory test during normal boot. |
Cold Boot Fast |
| Enable or disable Cold Boot Fast. |
AC Boot Fast |
| Enable or disable AC Boot Fast which is for AC boot only. Note This item is available and functional only when |
Global Data Scrambling |
| Memory traffic on the data bus is not random and can cause current “hot spots” on the DIMM. Memory data scrambling uses a data scrambling feature in the memory controller to create pseudo-random patterns on the data bus to reduce possibility of data-bit errors due to the impact of excessive current fluctuations |
Patrol Scrub |
| Patrol Scrub works in the background to proactively check DIMMs to repair correctable errors. When enabled, Patrol Scrub takes effect at the end of POST. |
Dynamic ECC Mode Selection |
| Enable or disable dynamic ECC mode selection. |
Memory Speed |
| Select the memory speed.
When a preset workload profile is selected, this setting is not changeable and is grayed out. To change the setting, select first. Then, you can make change to this setting. |
Memory Refresh Rate |
| Select the memory refresh rate. When a preset workload profile is selected, this setting is not changeable and is grayed out. To change the setting, select first. Then, you can make change to this setting. |
DDR5 ECS |
| The Error check and scrub (ECS) function allows early detection of possible DRAM failures to avoid or reduce downtime.
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Mirror Configuration | N/A | View and configure the memory mirror state. Note This item can be configured only when ADDDC Sparing is disabled and memory population meets the requirements. |
Memory Power Savings Advanced Option | N/A | Configure advanced settings for CKE and related memory power savings features. |