How to Tell What Type of Memory Your Linux PC Has Installed

How to Show the Installed Memory

Open up a terminal window and type in the following command from root:

dmidecode --type memory




Output:

[stephenmorrish@localhost ~]$ su

Password: 

[root@localhost stephenmorrish]# dmidecode --type memory

# dmidecode 2.10

SMBIOS 2.5 present.

Handle 0x0032, DMI type 16, 15 bytes

Physical Memory Array

        Location: System Board Or Motherboard

        Use: System Memory

        Error Correction Type: None

        Maximum Capacity: 16 GB

        Error Information Handle: Not Provided

        Number Of Devices: 4

Handle 0x0034, DMI type 17, 27 bytes

Memory Device

        Array Handle: 0x0032

        Error Information Handle: Not Provided

        Total Width: 64 bits

        Data Width: 64 bits

        Size: 1024 MB

        Form Factor: DIMM

        Set: None

        Locator: DIMM0

        Bank Locator: BANK0

        Type: DDR2

        Type Detail: Synchronous

        Speed: 667 MHz

        Manufacturer: Manufacturer0

        Serial Number: SerNum0

        Asset Tag: AssetTagNum0

        Part Number: PartNum0

Handle 0x0036, DMI type 17, 27 bytes

Memory Device

        Array Handle: 0x0032

        Error Information Handle: Not Provided

        Total Width: 64 bits

        Data Width: 64 bits

        Size: 1024 MB

        Form Factor: DIMM

        Set: None

        Locator: DIMM1

        Bank Locator: BANK1

        Type: DDR2

        Type Detail: Synchronous

        Speed: 667 MHz

        Manufacturer: Manufacturer1

        Serial Number: SerNum1

        Asset Tag: AssetTagNum1

        Part Number: PartNum1

Handle 0x0038, DMI type 17, 27 bytes

Memory Device

        Array Handle: 0x0032

        Error Information Handle: Not Provided

        Total Width: 64 bits

        Data Width: 64 bits

        Size: 1024 MB

        Form Factor: DIMM

        Set: None

        Locator: DIMM2

        Bank Locator: BANK2

        Type: DDR2

        Type Detail: Synchronous

        Speed: 667 MHz

        Manufacturer: Manufacturer2

        Serial Number: SerNum2

        Asset Tag: AssetTagNum2

        Part Number: PartNum2

Handle 0x003A, DMI type 17, 27 bytes

Memory Device

        Array Handle: 0x0032

        Error Information Handle: Not Provided

        Total Width: 64 bits

        Data Width: 64 bits

        Size: 1024 MB

        Form Factor: DIMM

        Set: None

        Locator: DIMM3

        Bank Locator: BANK3

        Type: DDR2

        Type Detail: Synchronous

        Speed: 667 MHz

        Manufacturer: Manufacturer3

        Serial Number: SerNum3

        Asset Tag: AssetTagNum3

        Part Number: PartNum3