dmidecode指令檢視記憶體型号

目前我的電腦記憶體隻有512M，想加根記憶體條。機器主機闆是nVidia Corporation MCP61,看了下主機闆說明

書發現系統記憶體支援雙通道記憶體技術。配置了4個DDRII DIMM插槽，支援DDRII 800/667/533記憶體，

最大支援8G容量。

為了嘗試下雙通道記憶體技術，打算買根跟原來一樣的記憶體條。發票的電腦組態上隻寫了kingston DDRII

512M。剩下的事情就是确定記憶體的工作頻率。上網google發現有個工具dmidecode(DMI table

decoder)。它可以全面的顯示你系統的資訊，包括bios、cpu、記憶體等資訊。

－－－－－－－－－－－－－－－－－開始操作－－－－－－－－－－－－－－－－－－－－－－－－－

[ray@localhost testcase]$ sudo dmidecode --help

Usage: dmidecode [OPTIONS]

Options are:

-d, --dev-mem FILE     Read memory from device FILE (default: /dev/mem)

-h, --help             Display this help text and exit

-q, --quiet            Less verbose output

-s, --string KEYWORD   Only display the value of the given DMI string

-t, --type TYPE        Only display the entries of given type

-u, --dump             Do not decode the entries

-V, --version          Display the version and exit

[ray@localhost testcase]$ sudo dmidecode -t memory

# dmidecode 2.7

SMBIOS 2.4 present.

Handle 0x0007, DMI type 5, 24 bytes.

Memory Controller Information

        Error Detecting Method: 64-bit ECC

        Error Correcting Capabilities:

                None

        Supported Interleave: One-way Interleave

        Current Interleave: One-way Interleave

        Maximum Memory Module Size: 2048 MB

        Maximum Total Memory Size: 8192 MB

        Supported Speeds:

                70 ns

                60 ns

        Supported Memory Types:

                DIMM

                SDRAM

        Memory Module Voltage: 3.3 V

        Associated Memory Slots: 4

                0x0008

                0x0009

                0x000A

                0x000B

        Enabled Error Correcting Capabilities:

Handle 0x0008, DMI type 6, 12 bytes.

Memory Module Information

        Socket Designation: DIMM0

        Bank Connections: 0 1

        Current Speed: Unknown

        Type: ECC DIMM

        Installed Size: 512 MB (Single-bank Connection)

        Enabled Size: 512 MB (Single-bank Connection)

        Error Status: OK

Handle 0x0009, DMI type 6, 12 bytes.

        Socket Designation: DIMM1

        Bank Connections: None

        Type: Unknown

        Installed Size: Not Installed

        Enabled Size: Not Installed

Handle 0x000A, DMI type 6, 12 bytes.

        Socket Designation: DIMM2

Handle 0x000B, DMI type 6, 12 bytes.

        Socket Designation: DIMM3

Handle 0x0010, DMI type 16, 15 bytes.

Physical Memory Array

        Location: System Board Or Motherboard

        Use: System Memory

        Error Correction Type: None

        Maximum Capacity: 8 GB

        Error Information Handle: Not Provided

        Number Of Devices: 4

Handle 0x0012, DMI type 17, 27 bytes.

Memory Device

        Array Handle: 0x0010

        Total 64 bits

        Data 72 bits

        Size: 512 MB

        Form Factor: DIMM

        Set: None

        Locator: DIMM0

        Bank Locator: BANK0

        Type: DDR2

        Type Detail: Synchronous

        Speed: 533 MHz (1.9 ns)

        Manufacturer: Manufacturer0

        Serial Number: SerNum0

        Asset Tag: AssetTagNum0

        Part Number: PartNum0

Handle 0x0014, DMI type 17, 27 bytes.

        Total Unknown

        Data 64 bits

        Size: No Module Installed

        Locator: DIMM1

        Bank Locator: BANK1

        Type Detail: Unknown

        Speed: Unknown

        Manufacturer: Manufacturer1

        Serial Number: SerNum1

        Asset Tag: AssetTagNum1

        Part Number: PartNum1

Handle 0x0016, DMI type 17, 27 bytes.

        Locator: DIMM2

        Bank Locator: BANK2

        Manufacturer: Manufacturer2

        Serial Number: SerNum2

        Asset Tag: AssetTagNum2

        Part Number: PartNum2

Handle 0x0018, DMI type 17, 27 bytes.

        Locator: DIMM3

        Bank Locator: BANK3

        Manufacturer: Manufacturer3

        Serial Number: SerNum3

        Asset Tag: AssetTagNum3

        Part Number: PartNum3

－－－－－－－－－－－－－－－－－－－結束操作－－－－－－－－－－－－－－－－－－－－－－－－－

在Memory Controller Information中，可以看到最大的記憶體大小是8G，支援記憶體種類為DIMM和SDRAM。

有四個Memory Slots。對應接下來的4個Memory Module Information。DMI type 16 (man

dmidecode裡面有DMI TYPES specification)的意思是 Physical Memory Array。 這裡也可以看出來，

最大支援記憶體為8G， 有4個記憶體裝置。最後則列出具體的4個記憶體裝置，其中發現了一個記憶體裝置為512M，

類型Type：DDR2， 工作頻率Speed: 533 MHz (1.9 ns)。這個就我目前電腦上的那根記憶體條。