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How shall I find out the frequency and type of my current RAM? My OS is Ubuntu 12.04.

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up vote 50 down vote accepted

This should do:

sudo lshw -short -C memory
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Only outputs "PCI (sysfs)" – T... Dec 15 '13 at 16:28
4  
Wait shortly, it will output more. – Malte Skoruppa Dec 15 '13 at 16:28
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This doesn't display the frequency. – Braiam Dec 15 '13 at 19:22
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It should, and it does for me: on my computer, two of the lines read "4GiB DIMM DDR3 Synchronous 1333 MHz (0.8 ns)" (corresponding to the two RAM slots where I have RAM installed). Did you look closely? – Malte Skoruppa Dec 15 '13 at 20:09
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This did not display the frequency for me in Ubuntu 15.04. Likely hardware dependent. Solution by Henrique worked though. – holocronweaver Apr 21 '15 at 17:30

Use the lshw command with the memory class:

$ sudo lshw -C memory
  # Some things about firmware and caches
  *-memory
       description: System Memory
       physical id: 13
       slot: System board or motherboard
       size: 8GiB
     *-bank:0
          description: DIMM [empty]
          product: [Empty]
          vendor: [Empty]
          physical id: 0
          serial: [Empty]
          slot: ChannelA-DIMM0
     *-bank:1
          description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)
          product: M471B5273DH0-CK0
          vendor: Samsung
          physical id: 1
          serial: 34A8C7AF
          slot: ChannelA-DIMM1
          size: 4GiB
          width: 64 bits
          clock: 1600MHz (0.6ns)
     # More banks.

As you can see, I'm using DDR3 1600MHz RAM.

Another option is dmidecode:

$ sudo dmidecode -t memory
# dmidecode 2.9
SMBIOS 2.5 present.

Handle 0x003B, DMI type 16, 15 bytes
Physical Memory Array
    Location: System Board Or Motherboard
    Use: System Memory
    Error Correction Type: Multi-bit ECC
    Maximum Capacity: Unknown
    Error Information Handle: Not Provided
    Number Of Devices: 8

Handle 0x003D, DMI type 17, 27 bytes
Memory Device
    Array Handle: 0x003B
    Error Information Handle: Not Provided
    Total Width: 72 bits
    Data Width: 64 bits
    Size: 4096 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM_A1
    Bank Locator: NODE 0 CHANNEL 0 DIMM 0
    Type: Other
    Type Detail: Synchronous
    Speed: 1067 MHz (0.9 ns)
    Manufacturer: 0x0198
    Serial Number: 0xB12A9593
    Asset Tag: Unknown
    Part Number: 9965426-037.A00LF 
# more such devices

This is for a server with ECC memory (as can be seen from the Error Correction Type field and the difference between Data Width and Total Width).

Both tools are dependencies of the ubuntu-standard package and should be available by default on all Ubuntu systems. There used to be another tool called hwinfo, which is no longer available for Ubuntu since 13.10.

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For me too: DDR3 1600 MHz. So does that mean both modules are the same type and I'm getting best performance? – H3R3T1K Aug 24 '14 at 20:17
    
@arno Yes, as far as I can tell. There's also a recommendation that modules should be in parallel banks (0/2/4, 1/3/5, etc.) for best performance - but I don't know if that's myth or fact. – muru Aug 24 '14 at 20:23

This will give you all information you may want, probably:

sudo dmidecode | grep -A 15 Memory
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Yes it shows. Mine for exemple is shown as: Speed: 1333 MHz Just after Type Detail. – Henrique Ferreira Dec 15 '13 at 19:44
    
dmidecode returns information from the bios... Maybe you have a problem with your bios... Don't know. – Henrique Ferreira Dec 15 '13 at 20:12
    
This was the only command that shows the frequency of my generic DRAM – McLeary Dec 23 '15 at 12:32

I could only get this info with dmidecode, but rather than grepping, it's cleaner to use the right type:

sudo dmidecode --type memory
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Try Hard info, for install run in terminal : sudo apt-get install hardinfo It has interface, and it's simple to use. )

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