Você pode obter tudo o que deseja com este comando:
sudo dmidecode --type memory
1ª parte da informação que você recebe:
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