Re: Kernel 4.9.0-7-686 Installed RAM vs. uabale RAM

Hello, I have a system with Kernel 4.9.0-7-686, installed RAM are 3x 1GB
but free -m only show 2GB.

Whats wrong here?

# free -m
              total        used        free      shared buff/cache
available
Mem:           2018         203        1204          25
610        1569
Swap:          8191           0        8191

# dmidecode -t 17
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.4 present.

Handle 0x0029, DMI type 17, 27 bytes
Memory Device
    Array Handle: 0x0028
    Error Information Handle: No Error
    Total Width: 72 bits
    Data Width: 64 bits
    Size: 1024 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM-1A
    Bank Locator: Not Specified
    Type: DDR2
    Type Detail: Synchronous
    Speed: 800 MHz
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified

Handle 0x002A, DMI type 17, 27 bytes
Memory Device
    Array Handle: 0x0028
    Error Information Handle: No Error
    Total Width: 72 bits
    Data Width: 64 bits
    Size: 1024 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM-2A
    Bank Locator: Not Specified
    Type: DDR2
    Type Detail: Synchronous
    Speed: 800 MHz
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified

Handle 0x002B, DMI type 17, 27 bytes
Memory Device
    Array Handle: 0x0028
    Error Information Handle: No Error
    Total Width: 72 bits
    Data Width: 64 bits
    Size: 1024 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM-1B
    Bank Locator: Not Specified
    Type: DDR2
    Type Detail: Synchronous
    Speed: 800 MHz
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified

Handle 0x002C, DMI type 17, 27 bytes
Memory Device
    Array Handle: 0x0028
    Error Information Handle: No Error
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: DIMM
    Set: None
    Locator: DIMM-2B
    Bank Locator: Not Specified
    Type: DDR2
    Type Detail: Synchronous
    Speed: 800 MHz
    Manufacturer: Not Specified
    Serial Number: Not Specified
    Asset Tag: Not Specified
    Part Number: Not Specified

As I know 6868 can address 4GB RAM

Best Regards,