How to check if RAM is running in ECC mode

Error Correcting Code (ECC) RAM is a variation of coputer memory which helps to ilimintate data curruption or ‘bit rot’, but it is not always imediately apparent if your system memory is running in ECC mode; here is a quick guide on how to check if your system memory is running in ECC mode. This guide covers Windows and Linux systems, but please ensure that if you are running either system in a virtual machine configuration that this command is ran on the host machine.

Linux – Check if ECC Mode is enabled

To check if a system’s memory is running in ECC mode on a Linux system, open up the terminal (elevation may be required in some instances) and type the following command:

dmidecode -t memory

or

dmidecode --type memory

Along with other memory statistics and information, your will receive the following item line if ECC is active and the mode in which it is running:

Error Correction Type: Multi-bit ECC

Furthermore, the dmidecode tool is very useful for learning more about the other areas of your system from the Linux terminal. You can find a great breakdown of some of its features here: https://www.redhat.com/sysadmin/linux-tools-dmidecode


Windows – Check if ECC Mode is enabled

Open the windows command prompt and enter the following wmic command:

wmic memphysical get memoryerrorcorrection
check if RAM is running in ECC mode - exitcode0
Using CMD to check if ECC is enabled

Note: if you are struggling to run WMIC command in your command prompt and receiving an error that ‘wmic is not recognized as an internal or external command, consider checking out this post where I demonstrate how to fix that: https://exitcode0.net/adding-wmic-command-to-the-windows-path/


As you can see from the example above, my Windows laptop returned a value of 3, but what does this mean?

Value Meaning 
0 (0x0) Reserved 

1 (0x1) Other 

2 (0x2) Unknown 

3 (0x3) None 

4 (0x4) Parity 

5 (0x5) Single-bit ECC 

6 (0x6) Multi-bit ECC 

7 (0x7) CRC

Unsurprisingly my laptop is not running any kind of ECC memory and returns None.

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