I have some failing RAM in a server and I ran dmidecode to figure out what tyoe of RAM I needed to replace it with.

The server has 6 RAM slots, 4 of which are in use. When I run dmidecode this is what I get.

dmidecode 2.10
SMBIOS 2.4 present.

Handle 0x001F, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: No Error
        Total Width: 72 bits
        Data Width: 64 bits
        Size: 2048 MB
        Form Factor: DIMM
        Set: 1
        Locator: JXXX
        Bank Locator: DIMM 00
        Type: DDR2
        Type Detail: Synchronous
        Speed: 667 MHz
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified

Handle 0x0020, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: No Error
        Total Width: 72 bits
        Data Width: 64 bits
        Size: 2048 MB
        Form Factor: DIMM
        Set: 1
        Locator: JXXX
        Bank Locator: DIMM 01
        Type: DDR2
        Type Detail: Synchronous
        Speed: 667 MHz
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified

Handle 0x0021, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: No Error
        Total Width: Unknown
        Data Width: Unknown
        Size: No Module Installed
        Form Factor: DIMM
        Set: 1
        Locator: JXXX
        Bank Locator: DIMM 02
        Type: DDR2
        Type Detail: Synchronous
        Speed: 667 MHz
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified

Handle 0x0022, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: No Error
        Total Width: Unknown
        Data Width: Unknown
        Size: No Module Installed
        Form Factor: DIMM
        Set: 1
        Locator: JXXX
        Bank Locator: DIMM 03
        Type: DDR2
        Type Detail: Synchronous
        Speed: 667 MHz
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified

Handle 0x0023, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: No Error
        Total Width: 72 bits
        Data Width: 64 bits
        Size: 2048 MB
        Form Factor: DIMM
        Set: 1
        Locator: JXXX
        Bank Locator: DIMM 10
        Type: DDR2
        Type Detail: Synchronous
        Speed: 667 MHz
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified

Handle 0x0024, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: No Error
        Total Width: 72 bits
        Data Width: 64 bits
        Size: 2048 MB
        Form Factor: DIMM
        Set: 1
        Locator: JXXX
        Bank Locator: DIMM 11
        Type: DDR2
        Type Detail: Synchronous
        Speed: 667 MHz
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified

Handle 0x0025, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: No Error
        Total Width: Unknown
        Data Width: Unknown
        Size: No Module Installed
        Form Factor: DIMM
        Set: 1
        Locator: JXXX
        Bank Locator: DIMM 12
        Type: DDR2
        Type Detail: Synchronous
        Speed: 667 MHz
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified

Handle 0x0026, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: No Error
        Total Width: Unknown
        Data Width: Unknown
        Size: No Module Installed
        Form Factor: DIMM
        Set: 1
        Locator: JXXX
        Bank Locator: DIMM 13
        Type: DDR2
        Type Detail: Synchronous
        Speed: 667 MHz
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified

Does anyone know why it would show 8 slots, with 4 empty instead of 6 slots with 2 empty? Also, but my records and by other tools, the server has 16Gb and not 8Gb in it currently.

grep MemTotal /proc/meminfo
MemTotal:     16435808 kB

The board is a Tyan S5372-LC, running CentOS 5.4 x64.

Also, my error log is showing errors in bank 6. Is there any way to determine which slot bank 6 is in via: dmidecode?