Linux: Check Ram/Memory Module/Bank Speed and Type

This is mostly a note to myself.

Dmidecode reports information about your system's hardware as described in your system BIOS according to the SMBIOS/DMI standard (see a sample output). This information typically includes system manufacturer, model name, serial number, BIOS version, asset tag as well as a lot of other details of varying level of interest and reliability depending on the manufacturer. This will often include usage status for the CPU sockets, expansion slots (e.g. AGP, PCI, ISA) and memory module slots, and the list of I/O ports (e.g. serial, parallel, USB). DMI data can be used to enable or disable specific portions of kernel code depending on the specific hardware. Thus, one use of dmidecode is for kernel developers to detect system "signatures" and add them to the kernel source code when needed. Beware that DMI data have proven to be too unreliable to be blindly trusted. Dmidecode does not scan your hardware, it only reports what the BIOS told it to.


cc@ea:~$ sudo dmidecode --type 17
# dmidecode 2.9
SMBIOS 2.6 present.

Handle 0x002B, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x002A
    Error Information Handle: No Error
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 2048 MB
    Form Factor: SODIMM
    Set: None
    Locator: DIMM 1
    Bank Locator: Bank 0/1
    Type: <out OF SPEC>
    Type Detail: Synchronous
    Speed: 1066 MHz (0.9 ns)
    Manufacturer: 80CE            
    Serial Number: 92AA7DD2        
    Asset Tag: 1016
    Part Number: M471B5673FH0-CF8  

Handle 0x002C, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x002A
    Error Information Handle: No Error
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: SODIMM
    Set: None
    Locator: DIMM 2
    Bank Locator: Bank 2/3
    Type: Unknown
    Type Detail: Synchronous
    Speed: Unknown
    Manufacturer:                 
    Serial Number:                 
    Asset Tag:     
    Part Number:                   
</out>

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