How do I know which RAM I'm using?

I want to buy some extra RAM but Hardinfo wont tell me which brand, model, latency and speed I'm currently using to buy the same kind.

What else can I use?

3 Answers

You can get all you want from this command:

sudo dmidecode --type memory

1st part of the information you get:

SMBIOS 2.7 present.
Handle 0x001B, DMI type 16, 23 bytes
Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 16 GB Error Information Handle: No Error Number Of Devices: 2
Handle 0x001C, DMI type 17, 34 bytes
Memory Device Array Handle: 0x001B Error Information Handle: 0x001E Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: SODIMM Set: None Locator: ChannelA-DIMM0 Bank Locator: BANK 0 Type: DDR3 Type Detail: Synchronous Speed: 1333 MHz Manufacturer: ELPIDA Serial Number: 5A0C95A6 Asset Tag: 0123456789 Part Number: EBJ41UF8BAS0-DJ-F Rank: Unknown Configured Clock Speed: 1333 MHz

This answer isn't particularly Ubuntu, but it's often the most convenient one.

Find out the model of your computer (or if it's a custom assembly job, of your motherboard). Enter the model in the memory search tool on the website of a major RAM vendor (for example Crucial or Kingston). The site will tell you which of their product are guaranteed to be compatible with your system. Even if you don't wish to buy from that vendor, you can note the characteristics and look them up on your favorite vendor.

Open a terminal (control + alt + t) and type the following command (it's sudo so you'll need to enter the password):

sudo dmidecode --type 17 | less

From here you'll see all the details you could ever want.