linux下dmidecode命令查看内存型号的方法

发布时间:2020-06-06编辑:脚本学堂
本文介绍下,在linux下用dmidecode命令查看内存型号的方法用例。有需要的朋友参考下吧。

机器主板是nVidia Corporation MCP61,系统内存支持双通道内存技术。
配置了4个DDRII DIMM插槽,支持DDRII 800/667/533内存,最大支持8G容量。

为了尝试下双通道内存技术,准备加一条与原来完全一样的内存条。
电脑配置上只写了kingston DDRII512M。

接下来就要用工具dmidecode(DMI table decoder)确定下内存频率了。

dmidecode命令可以全面的显示你系统的信息,包括bios、cpu、内存等信息。

例如:
[root@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
 

[root@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:
None
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.
Memory Module Information
Socket Designation: DIMM1
Bank Connections: None
Current Speed: Unknown
Type: Unknown
Installed Size: Not Installed
Enabled Size: Not Installed
Error Status: OK
Handle 0x000A, DMI type 6, 12 bytes.
Memory Module Information
Socket Designation: DIMM2
Bank Connections: None
Current Speed: Unknown
Type: Unknown

Installed Size: Not Installed

Enabled Size: Not Installed

Error Status: OK

Handle 0x000B, DMI type 6, 12 bytes.

Memory Module Information

Socket Designation: DIMM3

Bank Connections: None

Current Speed: Unknown

Type: Unknown

Installed Size: Not Installed

Enabled Size: Not Installed

Error Status: OK

Handle 0x0010, DMI type 16, 15 bytes.

Physical Memory Arroot

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
Arroot Handle: 0x0010
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 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.

Memory Device
Arroot Handle: 0x0010
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM1
Bank Locator: BANK1
Type: Unknown
Type Detail: Unknown
Speed: Unknown
Manufacturer: Manufacturer1
Serial Number: SerNum1
Asset Tag: AssetTagNum1
Part Number: PartNum1
Handle 0x0016, DMI type 17, 27 bytes.

Memory Device
Arroot Handle: 0x0010
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM2
Bank Locator: BANK2
Type: Unknown
Type Detail: Unknown
Speed: Unknown
Manufacturer: Manufacturer2
Serial Number: SerNum2
Asset Tag: AssetTagNum2
Part Number: PartNum2
Handle 0x0018, DMI type 17, 27 bytes.

Memory Device
Arroot Handle: 0x0010
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM3
Bank Locator: BANK3
Type: Unknown
Type Detail: Unknown
Speed: Unknown
Manufacturer: Manufacturer3
Serial Number: SerNum3
Asset Tag: AssetTagNum3
Part Number: PartNum3

 

总结:
在Memory Controller Information中,可以看到最大的内存大小是8G,支持内存种类为DIMM和SDRAM。有四个Memory Slots。对应接下来的4个Memory Module Information。
DMI type 16 (man dmidecode里面有DMI TYPES specification)的意思是 Physical Memory Arroot。

最大支持内存为8G, 有4个内存设备。最后则列出具体的4个内存设备,其中发现了一个内存设备为512M,类型Type:DDR2, 工作频率Speed: 533 MHz (1.9 ns)。这个就我
目前电脑上的那根内存条。