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前言：我电脑内存不够用，计划扩充内存。
方法：sudo dmidecode -t memory
Tips：使用的内存条型号建议一致，这样兼容性会好一些。
介绍：第一块介绍的是主板Array情况，单个接口最大64G，总共4个接口；第二块介绍的是Memory device的情况，我的电脑上的8G内存条插在Handle 0x0048，dd4类型，8G大小，制造商金士顿等等，无内存条的部分显示为Unknown。
问题：暂时无法通过命令查看内存插口类型是ddr3还是ddr4，期待同行提示。
➜ ~ git:(master) ✗ sudo dmidecode -t memory
[sudo] password for lee:
# dmidecode 3.1
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present.
Handle 0x0044, DMI type 16, 23 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 64 GB
Error Information Handle: Not Provided
Number Of Devices: 4
Handle 0x0045, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0044
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: Unknown
Set: None
Locator: DIMM_A1
Bank Locator: BANK 0
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified
Rank: Unknown
Configured Clock Speed: Unknown
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: Unknown
Handle 0x0046, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0044
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: Unknown
Set: None
Locator: DIMM_A2
Bank Locator: BANK 1
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified
Rank: Unknown
Configured Clock Speed: Unknown
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: Unknown
Handle 0x0047, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0044
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: Unknown
Set: None
Locator: DIMM_B1
Bank Locator: BANK 2
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified
Rank: Unknown
Configured Clock Speed: Unknown
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: Unknown
Handle 0x0048, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0044
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: DIMM_B2
Bank Locator: BANK 3
Type: DDR4
Type Detail: Synchronous
Speed: 1600 MT/s
Manufacturer: Kingston
Serial Number: 23365417
Asset Tag: 9876543210
Part Number: KHX2133C14/8G
Rank: 1
Configured Clock Speed: 1600 MT/s
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: 1.2 V