I just purchased two 8GB Ram sticks which are packaged at 1866Mhz - my system only supports 1600MHz, so I was expecting them to run at this speed.
But when I examine the output of dmidecode, it reports Speed: 1333 MHz
and Configured Clock Speed: 1600 MHz
. (Where as the existing 4GB stick is running at 1600). Should this be expected? Is there a reason it would be 1333 rather than 1600?
sudo dmidecode --type memory
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.
Handle 0x003D, DMI type 16, 23 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: Single-bit ECC
Maximum Capacity: 32 GB
Error Information Handle: Not Provided
Number Of Devices: 4
Handle 0x003E, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x003D
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: DIMM3
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: 1333 MHz
Manufacturer: Micron
Serial Number: 0EF0CD0AC012
Asset Tag: 15162000
Part Number: 18JSF1G72AZ-1G9P1
Rank: 2
Configured Clock Speed: 1600 MHz
Handle 0x0040, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x003D
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: DIMM
Set: None
Locator: DIMM1
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: 1600 MHz
Manufacturer: Hynix/Hyundai
Serial Number: 0AF08C05F080
Asset Tag: 01144100
Part Number: HMT451U7AFR8A-PB
Rank: 1
Configured Clock Speed: 1600 MHz
Handle 0x0042, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x003D
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: DIMM4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: 1333 MHz
Manufacturer: Micron
Serial Number: 07E0CE0AC012
Asset Tag: 15162000
Part Number: 18JSF1G72AZ-1G9P1
Rank: 2
Configured Clock Speed: 1600 MHz
Handle 0x0044, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x003D
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM2
Bank Locator: Not Specified
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: [Empty]
Serial Number: [Empty]
Asset Tag: 00000000
Part Number: [Empty]
Rank: Unknown
Configured Clock Speed: Unknown