1.主板支持最大内存
# dmidecode |grep "Maximum Capacity"
Maximum Capacity: 128 GB
2.现有内存
# dmidecode |grep "Range Size"
Range Size: 3328 MB
Range Size: 13056 MB
3.内存具体信息
# dmidecode |grep -A16 "Memory Device$" //查看Memory Device$后面16行内容
或dmidecode -t 17 //17对应内存设备。具体数字对应什么设备，请参照附录
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: DIMM
Set: 1
Locator: DIMM_A1
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: 1333 MHz
Manufacturer: 00AD04B380AD
Serial Number: 468BC44D
Asset Tag: 01123321
Part Number: HMT351R7CFR8A-H9
--
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: DIMM
Set: 1
Locator: DIMM_A2
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: 1333 MHz
Manufacturer: 00AD04B380AD
Serial Number: 462BC44F
Asset Tag: 01123321
Part Number: HMT351R7CFR8A-H9
--
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: 2
Locator: DIMM_A3
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: Unknown
Manufacturer:
Serial Number:
Asset Tag:
Part Number:
--
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: 2
Locator: DIMM_A4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: Unknown
Manufacturer:
Serial Number:
Asset Tag:
Part Number:
--
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: DIMM
Set: 5
Locator: DIMM_B1
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: 1333 MHz
Manufacturer: 00AD04B380AD
Serial Number: 461BC44F
Asset Tag: 01123321
Part Number: HMT351R7CFR8A-H9
--
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: DIMM
Set: 6
Locator: DIMM_B2
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: 1333 MHz
Manufacturer: 00AD04B380AD
Serial Number: 464BC440
Asset Tag: 01123321
Part Number: HMT351R7CFR8A-H9
--
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: 6
Locator: DIMM_B3
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: Unknown
Manufacturer:
Serial Number:
Asset Tag:
Part Number:
--
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: 4
Locator: DIMM_B4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: Unknown
Manufacturer:
Serial Number:
Asset Tag:
Part Number:
size不为空的，即插有内存的。这边可以看到，机子上插了4根4G内存，类型为DDR3，频率为133。
附录：
# dmidecode -t type //type可以为数字或数字后面的单词,如system,baseboard等，具体单词可以通过dmidecode -t --help查看。
0 BIOS
1 System
2 BaseBoard
3 Chassis
4 Processor
5 Memory Controller
6 Memory Module
7 Cache
8 Port Connector
9 System Slots
10 On Board Devices
11 OEM Strings
12 System Configuration Options
13 BIOS Language
14 Group Associations
15 System Event Log
16 Physical Memory Array
17 Memory Device
18 32-bit Memory Error
19 Memory Array Mapped Address
20 Memory Device Mapped Address
21 Built-in Pointing Device
22 Portable Battery
23 System Reset
24 Hardware Security
25 System Power Controls
26 Voltage Probe
27 Cooling Device
28 Temperature Probe
29 Electrical Current Probe
30 Out-of-band Remote Access
31 Boot Integrity Services
32 System Boot
33 64-bit Memory Error
34 Management Device
35 Management Device Component
36 Management Device Threshold Data
37 Memory Channel
38 IPMI Device
39 Power Supply