Linux: Check Ram Speed and Type
In case we need to know our laptop RAM details without opening system, let’s take a scenario were i need to upgrade my laptop RAM, for same i need to know exact configuration of my installed RAM. i know in my laptop there are two RAM slots and only one is installed and another one is vacant where i can install another RAM to upgrade which will increase system performance. So in this post we will see how Check Ram Speed and Type.
For same we will going to use dmidecode command to dump a computer’s DMI (some say SMBIOS) table contents in a human-readable format. This table contains a description of the system’s hardware components, as well as other useful pieces of information such as serial numbers and BIOS revision. This command is available on Linux/Unix debian based systems.
I am using Ubuntu machine to collect data with dmidecode, this will also work in RHEL/CentOS Machines.
# lsb_release -d Description: Ubuntu 16.04.3 LTS # uname -rm 4.4.0-112-generic x86_64
Dmidecode command: RAM Details
we need to open terminal and type below command to collect RAM details
dmidecode –type 17
Below image show how it show Output .
It has all required details for RAM (main memory) of Linux/Unix System like DIMM, Type, Speed which anyone required while order new RAM to upgrade main memory of system.
we can also get other details with dmidecode command with various other types.
# dmidecode --type dmidecode: option '--type' requires an argument Type number or keyword expected Valid type keywords are: bios system baseboard chassis processor memory cache connector slot
So its not important for mentioned number only with type , we can also use exact name of part which we need to know through dmidecode, like we can get detail for Bios what all devices and services supported through bios.
root@jarvis:~# dmidecode -t bios # dmidecode 3.0 Getting SMBIOS data from sysfs. SMBIOS 2.8 present. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: Dell Inc. Version: A10 Release Date: 01/12/2016 Address: 0xF0000 Runtime Size: 64 kB ROM Size: 12288 kB Characteristics: PCI is supported PNP is supported BIOS is upgradeable BIOS shadowing is allowed Boot from CD is supported Selectable boot is supported EDD is supported 5.25"/1.2 MB floppy services are supported (int 13h) 3.5"/720 kB floppy services are supported (int 13h) 3.5"/2.88 MB floppy services are supported (int 13h) Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Serial services are supported (int 14h) Printer services are supported (int 17h) ACPI is supported USB legacy is supported Smart battery is supported BIOS boot specification is supported Function key-initiated network boot is supported Targeted content distribution is supported UEFI is supported BIOS Revision: 65.10 Handle 0xF0CB, DMI type 13, 22 bytes BIOS Language Information Language Description Format: Long Installable Languages: 1 en|US|iso8859-1 Currently Installed Language: en|US|iso8859-1
we could also check Memory and RAM details with lshw command, which will also provide details for RAM and other cache available in machine. For examples , i am trying to check Memory on my lappy which is dell latitude E7250.
root@jarvis:~# lshw -C memory *-firmware description: BIOS vendor: Dell Inc. physical id: 0 version: A10 date: 01/12/2016 size: 64KiB capacity: 11MiB capabilities: pci pnp upgrade shadowing cdboot bootselect edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb smartbattery biosbootspecification netboot uefi *-cache:0 description: L1 cache physical id: 3e slot: L1 Cache size: 32KiB capacity: 32KiB capabilities: synchronous internal write-back instruction configuration: level=1 *-cache:1 description: L2 cache physical id: 43 slot: L2 Cache size: 256KiB capacity: 256KiB capabilities: synchronous internal write-back unified configuration: level=2 *-cache:2 description: L3 cache physical id: 48 slot: L3 Cache size: 4MiB capacity: 4MiB capabilities: synchronous internal write-back unified configuration: level=3 *-cache description: L1 cachesize: 32KiB capacity: 32KiB capabilities: synchronous internal write-back data configuration: level=1 *-memory description: System Memory physical id: 52 slot: System board or motherboard size: 16GiB *-bank:0 description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns) product: HMT41GS6BFR8A-PB vendor: Hynix/Hyundai physical id: 0 serial: 80A3BA85 slot: DIMM A size: 8GiB width: 64 bits clock: 1600MHz (0.6ns) *-bank:1 description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns) product: HMT41GS6BFR8A-PB vendor: Hynix/Hyundai physical id: 1 serial: A2DAF29E slot: DIMM B size: 8GiB width: 64 bits clock: 1600MHz (0.6ns)
we can also make it more readable and fit on one screen.
root@jarvis:~# lshw -short -C memory H/W path Device Class Description ======================================================= /0/0 memory 64KiB BIOS /0/4d/3e memory 32KiB L1 cache /0/4d/43 memory 256KiB L2 cache /0/4d/48 memory 4MiB L3 cache /0/39 memory 32KiB L1 cache /0/52 memory 16GiB System Memory /0/52/0 memory 8GiB SODIMM DDR3 Synchronous 1600 MHz (0.6 ns) /0/52/1 memory 8GiB SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)
No we know how to collect various hardware details in Linux/Unix machine with dmidecode command, there are various other things which could worked out with same command, refer man dmidecode to get more info on same.