A few weeks ago I decided to upgrade my laptop memory. In order to determine which type I need I used the following command on my Linux box (Ubuntu 10.04, not inside VM):
sudo dmidecode --type memory
And the output was:
# dmidecode 2.9 SMBIOS 2.5 present. Handle 0x001B, DMI type 16, 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 4 GB Error Information Handle: Not Provided Number Of Devices: 2 Handle 0x001C, DMI type 17, 27 bytes Memory Device Array Handle: 0x001B Error Information Handle: No Error Total Width: 64 bits Data Width: 64 bits Size: 2048 MB Form Factor: SODIMM Set: 1 Locator: M1 Bank Locator: Bank 0 Type: DDR2 Type Detail: Synchronous Speed: 667 MHz (1.5 ns) Manufacturer: Mfg 0 Serial Number: 1234-B0 Asset Tag: Not Specified Part Number: SODIMM000 Handle 0x001D, DMI type 17, 27 bytes Memory Device Array Handle: 0x001B Error Information Handle: No Error Total Width: Unknown Data Width: Unknown Size: No Module Installed Form Factor: SODIMM Set: 1 Locator: M2 Bank Locator: Bank 1 Type: DDR2 Type Detail: Synchronous Speed: 667 MHz (1.5 ns) Manufacturer: Mfg 1 Serial Number: 1234-B1 Asset Tag: Not Specified Part Number: SODIMM001
So I bought 1 SO-DIMM DDR2 667 (PC2-5300). When the product arrived, I tried to install it, but I found that, to my surprising, the remaining slot was incompatible - the card could not be inserted into the slot. It turned out that the slot was designed for DDR3 (as it is written on the slot), not DDR2 which is displayed by
Is it possible that
dmidecode is showing incorrect data for memory type / speed?
If yes, how can I check the right memory type without it?