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How to identify a device > RAM
How to identify the installed Memory / RAM.
Many people simply use free, which is available on every Debian system, to list the quantity of RAM installed (detected). Gnome users can install and use the hardinfo. KDE user can use kinfocenter.
free
free is the Unix command to know about free/used/available memory on your system:
under Gnome: hardinfo
Gnomes's System Information (Hardinfo in Menu Applications/System Tools, from package:hardinfo) has an information page on the RAM installed.
under KDE: KInfocenter
KDE's KInfoCenter (in K Menu / System / KInfoCenter Info Center, from package:kcontrol) has an information page on the RAM installed.
dmidecode
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dmidecode can be used to query the motherboards DMI zone about RAM, Ram Slot(s) and Memory Controller:
dmidecode -t memory is equivalent to running the 4 commands below (i.e dmidecode -t 5 -t 6 -t 16 -t 17)
Memory Device
Memory Controller Information
Memory Module Information
lshw
Linux Check Memory Size
You can also check information about RAM (like speed, type, etc) using lshw (from package lshw).
References
manpages: free(1), dmidecode(8)
This is our sixth post on getting hardware information. In this post we will see how to get RAM details such as size, speed, make, maximum capacity allowed RAM etc. We already covered some hardware related stuff in this series so far as given below.
Get BIOS, Firmware, Hardware And Drivers Details in Linux/Unix
Example1: Find RAM size(Total, available, used) in Linux. We can use below five methods to get details.
free
Want to understand free command output? check our post on free command.
Output:
top
Check our excelent post to understand Linux top command output.
Output:
Output:
Output:
dmidecode –type memory
or
dmidecode -t 17
Output:
Example 2: Get RAM information like location, Maximum capacity of RAM supported, number of RAM devices present and sa lot info.
Output:
Example 3: Find RAM information like Type of RAM(SD RAM or DDR2/3), Speed, Manufacture etc
Output:
In our next post in this series we will see BIOS and Processer details.
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