Tips

檢查記憶體速度和種類

要檢查這種資訊需要存取 SMBIOS 的資訊， 而 biosdecode 就是負責這工作的 CLI 工具， 而 dmidecode 則是更進一步轉成可讀的資訊。

安裝：

$ sudo pacman -S dmidecode  # biosdecode 也在裡面

使用：

$ sudo dmidecode --type 17
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.8 present.

Handle 0x003A, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x0039
    Error Information Handle: Not Provided
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 4096 MB
    Form Factor: Chip
    Set: None
    Locator: System Board Memory
    Bank Locator: BANK 0
    Type: LPDDR3
    Type Detail: Synchronous
    Speed: 1867 MHz
    Manufacturer: Elpida
    Serial Number: 12131010
    Asset Tag: 9876543210
    Part Number: EDFA232A2MA-JD-F-R
    Rank: 2
    Configured Clock Speed: 1867 MHz
    Minimum Voltage: Unknown
    Maximum Voltage: Unknown
    Configured Voltage: 1.2 V

Handle 0x003B, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x0039
    Error Information Handle: Not Provided
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 4096 MB
    Form Factor: Chip
    Set: None
    Locator: System Board Memory
    Bank Locator: BANK 1
    Type: LPDDR3
    Type Detail: Synchronous
    Speed: 1867 MHz
    Manufacturer: Elpida
    Serial Number: 12031104
    Asset Tag: 9876543210
    Part Number: EDFA232A2MA-JD-F-R
    Rank: 2
    Configured Clock Speed: 1867 MHz
    Minimum Voltage: Unknown
    Maximum Voltage: Unknown
    Configured Voltage: 1.2 V

另外也可以使用 lshw ， 安裝：

$ sudo pacman -S lshw

使用：

$ sudo lshw -short -C memory
H/W path         Device   Class          Description
====================================================
/0/0                      memory         64KiB BIOS
/0/38/35                  memory         64KiB L1 cache
/0/38/36                  memory         512KiB L2 cache
/0/38/37                  memory         3MiB L3 cache
/0/34                     memory         64KiB L1 cache
/0/39                     memory         8GiB System Memory
/0/39/0                   memory         4GiB Chip LPDDR3 Synchronous 1867 MHz (0.5 ns)
/0/39/1                   memory         4GiB Chip LPDDR3 Synchronous 1867 MHz (0.5 ns)
/0/100/1f.2               memory         Memory controller

參考：

• Linux: Check Ram Speed and Type