How to see memory information such as type and speed
How to see the memory details on Linux?
Run the dmidecode command and filter for type 17 information.
dmidecode --type 17 | grep -E "Type|Speed"Finding out the memory specifications on a Linux system is easy when using the dmidecode command. Let’s have a look at what information can be extracted and how to zoom in on some specifics, like memory type and memory speed.
Show all memory
The first option to use is --typememory to retrieve information about the memory, but also from the motherboard.
# dmidecode --type memory
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 3.3.0 present.
Handle 0x0042, 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: 2
snipped
The output will show all information related to memory, including the relevant parts of the motherboard, including the maximum capacity of memory.
The keyword memory includes:
- Type 5: Memory Controller
- Type 6: Memory Module
- Type 16: Physical Memory Array
- Type 17: Memory Device
Show the memory modules
If you are interested in the memory modules, then it might be better to specify --type17, or the memory devices.
# dmidecode --type 17
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 3.3.0 present.
Handle 0x0047, DMI type 17, 92 bytes
Memory Device
Array Handle: 0x0042
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 32 GB
Form Factor: SODIMM
Set: None
Locator: Controller0-ChannelA-DIMM0
Bank Locator: BANK 0
Type: DDR4
Type Detail: Synchronous
Speed: 3200 MT/s
Manufacturer: Micron Technology
Serial Number: ABCDABCD
Asset Tag: 9876543210
Part Number: 16ATF4G64HZ-3G2F1
Rank: 2
Configured Memory Speed: 3200 MT/s
Minimum Voltage: 1.2 V
Maximum Voltage: 1.2 V
Configured Voltage: 1.2 V
Memory Technology: DRAM
Memory Operating Mode Capability: Volatile memory
Firmware Version: Not Specified
Module Manufacturer ID: Bank 1, Hex 0x2C
Module Product ID: Unknown
Memory Subsystem Controller Manufacturer ID: Unknown
Memory Subsystem Controller Product ID: Unknown
Non-Volatile Size: None
Volatile Size: 32767 MB
Cache Size: None
Logical Size: None
Show only type and speed
To quickly extract some details such type and speed, we can filter out these rows from the output.
# dmidecode --type 17 | grep -E 'Type|Speed'
Type: DDR4
Type Detail: Synchronous
Speed: 3200 MT/s
Configured Memory Speed: 3200 MT/s
Type: DDR4
Type Detail: Synchronous
Speed: 3200 MT/s
Configured Memory Speed: 3200 MT/s
