• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Memory Rank 4DRx4

G

Gabornski

Member
In DDR4 server memory I have started seeing both 4Rx4 and 4DRx4 rank descriptions. Does anyone know what the "D" stand for?

Thanks
 
The "DR" is used by Samsung to indicate that dual-die packaged chips are used.

Conventionally, you can tell the number of ranks in a DIMM by counting the number of chips and their width. So, if you have a module with 36 chips with an x4 (4 bits per chip) designation, then you would expect this to be 144 bits, or 2 ranks.

Because samsung package some RAM chips as dual-die, then it is possible to have a 4 rank DIMM with 36 x4 chips.

For samsung's new stacked die packaging, then they tend to use the terms 2S and 4S, to indicate the number of dies per chip package.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top