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King David
Asked: 2022-08-23 04:53:45 +0800 CST

为什么添加两张调光卡后配置的时钟速度发生了变化

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我们有带 DELL 硬件的 Linux 机器，机器有 256G 内存

在添加 32G 的新 DIMM 卡之前，我们验证Configured Clock Speed是 2400MHz

所以后来我们在这台机器上添加了额外的 32G（2 个 DIMM 卡，与机器已有的 DIMM 卡类型相同），机器启动后，我们检查了Configured Clock Speed，dmidecode我们发现它已经改变了

所以Configured Clock Speed从更改2400MHz为1866 MHz

例子

添加新 DIMM 之前

dmidecode | grep "Configured Clock Speed"
        Configured Clock Speed: 2133 MHz
        Configured Clock Speed: 2133 MHz
        Configured Clock Speed: 2133 MHz
        Configured Clock Speed: 2133 MHz
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: 2133 MHz
        Configured Clock Speed: 2133 MHz
        Configured Clock Speed: 2133 MHz
        Configured Clock Speed: 2133 MHz
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown

添加新 DIMM 后

  Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: 1866 MHz
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown
        Configured Clock Speed: Unknown

那么改变的原因可能是什么？，为什么要加一个dimm内存，然后Configured Clock Speed改成这样呢？

Server is Dell PowerEdge R730 and memories are:

Memory Device
    Array Handle: 0x1000
    Error Information Handle: Not Provided
    Total Width: 72 bits
    Data Width: 64 bits
    Size: 16384 MB
    Form Factor: DIMM
    Set: 3
    Locator: A9
    Bank Locator: Not Specified
    Type: DDR4
    Type Detail: Synchronous Registered (Buffered)
    Speed: 2400 MHz
    Manufacturer: 002C0632002C
    Serial Number: 1B42681B
    Asset Tag: 001808A0
    Part Number: 18ASF2G72PDZ-2G3D1
    Rank: 2
    Configured Clock Speed: 1866 MHz
    Minimum Voltage:  1.2 V
    Maximum Voltage:  1.2 V
    Configured Voltage:  1.2 V

在此处输入图像描述

memory redhat-enterprise-linux

1 个回答

  1. Best Answer

    您的服务器有 2 组，每组有 12 个 DIMM 插槽。每组被组织成 4 个记忆通道。每个通道的前两个 DIMM 插槽支持高达 2400MHz 的速度，但第三个插槽仅支持 1866MHz。当您开始填充第三个插槽时，所有速度都会降至系统上的最低速度。查看用户手册了解更多详情。

    • 2

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