$ sudo dmidecode -t 16
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.
Handle 0x0024, DMI type 16, 23 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 32 GB
Error Information Handle: No Error
Number Of Devices: 2
$ sudo dmidecode -t 17
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.
Handle 0x0025, DMI type 17, 84 bytes
Memory Device
Array Handle: 0x0024
Error Information Handle: No Error
Total Width: 64 bits
Data Width: 64 bits
Size: 8 GB
Form Factor: SODIMM
Set: None
Locator: ChannelA-DIMM0
Bank Locator: BANK 0
Type: DDR4
Type Detail: Synchronous
Speed: 2933 MT/s
Manufacturer: Smart Brazil
Serial Number: 111
Asset Tag: 22222
Part Number: 33333
Rank: 1
Configured Memory Speed: 2933 MT/s
Minimum Voltage: 1.25 V
Maximum Voltage: 1.35 V
Configured Voltage: 1.2 V
Memory Technology: DRAM
Memory Operating Mode Capability: Volatile memory
Firmware Version: Not Specified
Module Manufacturer ID: Bank 2, Hex 0x94
Module Product ID: Unknown
Memory Subsystem Controller Manufacturer ID: Unknown
Memory Subsystem Controller Product ID: Unknown
Non-Volatile Size: None
Volatile Size: 8 GB
Cache Size: None
Logical Size: None
Handle 0x0026, DMI type 17, 84 bytes
Memory Device
Array Handle: 0x0024
Error Information Handle: No Error
Total Width: 64 bits
Data Width: 64 bits
Size: 8 GB
Form Factor: SODIMM
Set: None
Locator: ChannelB-DIMM0
Bank Locator: BANK 2
Type: DDR4
Type Detail: Synchronous
Speed: 2933 MT/s
Manufacturer: Crucial
Serial Number: 111
Asset Tag: 222
Part Number: 333
Rank: 1
Configured Memory Speed: 2933 MT/s
Minimum Voltage: 1.25 V
Maximum Voltage: 1.35 V
Configured Voltage: 1.2 V
Memory Technology: DRAM
Memory Operating Mode Capability: Volatile memory
Firmware Version: Not Specified
Module Manufacturer ID: Bank 6, Hex 0x9B
Module Product ID: Unknown
Memory Subsystem Controller Manufacturer ID: Unknown
Memory Subsystem Controller Product ID: Unknown
Non-Volatile Size: None
Volatile Size: 8 GB
Cache Size: None
Logical Size: None
$ sudo apt install i2c-tools
$ decode-dimms
# decode-dimms version 4.3
Memory Serial Presence Detect Decoder
By Philip Edelbrock, Christian Zuckschwerdt, Burkart Lingner,
Jean Delvare, Trent Piepho and others
Decoding EEPROM: /sys/bus/i2c/drivers/ee1004/0-0050
Guessing DIMM is in bank 1
Kernel driver used ee1004
---=== SPD EEPROM Information ===---
EEPROM CRC of bytes 0-125 OK (0x12E4)
# of bytes written to SDRAM EEPROM 384
Total number of bytes in EEPROM 512
Fundamental Memory type DDR4 SDRAM
SPD Revision 1.1
Module Type SO-DIMM
EEPROM CRC of bytes 128-253 OK (0x55EF)
---=== Memory Characteristics ===---
Maximum module speed 3200 MT/s (PC4-25600)
Size 8192 MB
Banks x Rows x Columns x Bits 16 x 16 x 10 x 64
SDRAM Device Width 8 bits
Ranks 1
Primary Bus Width 64 bits
AA-RCD-RP-RAS (cycles) 22-22-22-52
Supported CAS Latencies 24T, 22T, 21T, 20T, 19T, 18T, 17T, 16T, 15T, 14T, 13T, 12T, 11T, 10T
---=== Timings at Standard Speeds ===---
AA-RCD-RP-RAS (cycles) as DDR4-3200 22-22-22-52
AA-RCD-RP-RAS (cycles) as DDR4-2933 21-21-21-47
AA-RCD-RP-RAS (cycles) as DDR4-2666 19-19-19-43
AA-RCD-RP-RAS (cycles) as DDR4-2400 17-17-17-39
AA-RCD-RP-RAS (cycles) as DDR4-2133 15-15-15-35
AA-RCD-RP-RAS (cycles) as DDR4-1866 13-13-13-30
AA-RCD-RP-RAS (cycles) as DDR4-1600 11-11-11-26
---=== Timing Parameters ===---
Minimum Cycle Time (tCKmin) 0.625 ns
Maximum Cycle Time (tCKmax) 1.600 ns
Minimum CAS Latency Time (tAA) 13.750 ns
Minimum RAS to CAS Delay (tRCD) 13.750 ns
Minimum Row Precharge Delay (tRP) 13.750 ns
Minimum Active to Precharge Delay (tRAS) 32.000 ns
Minimum Active to Auto-Refresh Delay (tRC) 45.750 ns
Minimum Recovery Delay (tRFC1) 350.000 ns
Minimum Recovery Delay (tRFC2) 260.000 ns
Minimum Recovery Delay (tRFC4) 160.000 ns
Minimum Four Activate Window Delay (tFAW) 21.000 ns
Minimum Row Active to Row Active Delay (tRRD_S) 2.500 ns
Minimum Row Active to Row Active Delay (tRRD_L) 4.900 ns
Minimum CAS to CAS Delay (tCCD_L) 5.000 ns
Minimum Write Recovery Time (tWR) 15.000 ns
Minimum Write to Read Time (tWTR_S) 2.500 ns
Minimum Write to Read Time (tWTR_L) 7.500 ns
---=== Other Information ===---
Package Type Monolithic
Maximum Activate Count (MAC) Unlimited
Post Package Repair One row per bank group
Soft PPR Supported
Module Nominal Voltage 1.2 V
Thermal Sensor No
---=== Physical Characteristics ===---
Module Height 30 mm
Module Thickness 2 mm front, 2 mm back
Module Reference Card A revision 1
---=== Manufacturer Data ===---
Module Manufacturer Smart Modular
DRAM Manufacturer Smart Modular
Manufacturing Location Code 0x06
Manufacturing Date 2020-W40
Assembly Serial Number 0x05F7694E
Part Number SMS4WEC8C1K0446FCG
Number of SDRAM DIMMs detected and decoded: 1