linux查看内存条详细信息（频率，插槽，当前大小，最大容量）

root模式下运行命令：

 dmidecode -t memory 

输出如下：

[root@localhost MD]# dmidecode -t memory
# dmidecode 3.1
Getting SMBIOS data from sysfs.
SMBIOS 3.0 present.

Handle 0x004C, DMI type 16, 23 bytes
Physical Memory Array
    Location: System Board Or Motherboard
    Use: System Memory
    Error Correction Type: None
    Maximum Capacity: 64 GB
    Error Information Handle: Not Provided
    Number Of Devices: 4

Handle 0x004D, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x004C
    Error Information Handle: Not Provided
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: Unknown
    Set: None
    Locator: ChannelA-DIMM0
    Bank Locator: BANK 0
    Type: Unknown
    Type Detail: None
    Speed: Unknown
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified
    Rank: Unknown
    Configured Clock Speed: Unknown
    Minimum Voltage: Unknown
    Maximum Voltage: Unknown
    Configured Voltage: Unknown

Handle 0x004E, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x004C
    Error Information Handle: Not Provided
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 8192 MB
    Form Factor: DIMM
    Set: None
    Locator: ChannelA-DIMM1
    Bank Locator: BANK 1
    Type: DDR4
    Type Detail: Synchronous
    Speed: 2133 MT/s
    Manufacturer: Samsung
    Serial Number: 51132416
    Asset Tag: 9876543210
    Part Number: M378A1K43BB1-CPB    
    Rank: 1
    Configured Clock Speed: 2133 MT/s
    Minimum Voltage: Unknown
    Maximum Voltage: Unknown
    Configured Voltage: 1.2 V

Handle 0x004F, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x004C
    Error Information Handle: Not Provided
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: Unknown
    Set: None
    Locator: ChannelB-DIMM0
    Bank Locator: BANK 2
    Type: Unknown
    Type Detail: None
    Speed: Unknown
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified
    Rank: Unknown
    Configured Clock Speed: Unknown
    Minimum Voltage: Unknown
    Maximum Voltage: Unknown
    Configured Voltage: Unknown

Handle 0x0050, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x004C
    Error Information Handle: Not Provided
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 8192 MB
    Form Factor: DIMM
    Set: None
    Locator: ChannelB-DIMM1
    Bank Locator: BANK 3
    Type: DDR4
    Type Detail: Synchronous
    Speed: 2133 MT/s
    Manufacturer: Samsung
    Serial Number: 14172122
    Asset Tag: 9876543210
    Part Number: M378A1G43DB0-CPB    
    Rank: 2
    Configured Clock Speed: 2133 MT/s
    Minimum Voltage: Unknown
    Maximum Voltage: Unknown
    Configured Voltage: 1.2 V

代表目前有两根内存条，频率2133MHz，DDR4，各8G，共16G，最大64G