Wikipedia about DD4 SDRAM

Example speed indication for a DDR4-2666 module
MB/s: MegaBytes per second
MT/s: MegaTransfers per second

• Not all memory can be mixed even if it has the same speed
  • Be aware that it is possible that the memory controller can only make one setting which will be valid for al slots
  • Make sure the ranking is the same
  • Make sure the brand of the used chips all the DIMM's is the same
  • Make sure the production date is the same
  • Conclusion: Buy the DIMM's as a set otherwise chances are great your computer will not start up, not even in BIOS or UEFI
• Single and double rank
  • Single rank DIMM: 1Rx4 or 1Rx8 on the DIMM module label
  • Double rank DIMM: 2Rx4 or 2Rx8 on the DIMM module label
• JDEC / SPD and XMP profiles
• Single channel (any number of DIMM installed) and dual channel (even number off DIMM's installed)
• 1,2V and 1,35V. Warning: Watch out when using 1,2V memory at 1,35V. You might damage the memory

Tools to read the SPD memory on the DIMM's
i2c-tools contains

• i2cdetect
• i2cbusses ?
• i2cdump
• i2cget
• i2cset
• i2ctransfer
• i2c-stub-from-dump

On newer ASrock motherboards you can see the memory settings in the UEFI tab “OC Tweaker” under “DRAM Information”

DDR4 memory information in Linux

Main subjects on this wiki: Linux, Debian, HTML, Microcontrollers, Privacy

RSS
Disclaimer
Privacy statement
Bugs statement
Cookies
Copyright © : 2014 - 2024 Webevaluation.nl and the authors
Changes reserved.