Xebec
Well-known member
In the vein of "Ask the Experts" --
I understand that denser DRAM spends more time refreshing than 'less dense DRAM', in terms of operating time (read/write) vs. refresh time. Example: a 64GB DIMM can be expected to 'lose more bandwidth waiting for refresh' than a 32GB or 16GB DIMM.
Does this increasing refresh time with density present a limit on how densely we can scale DRAM? .. or is this something that gets worked around with finer granularity on refresh timing, or other tricks in the future?
(I also assume 3D DRAM isn't really phased by this since each stack will potentially refresh at the same time - reducing the # of rows/cycles that must refresh at once, per GB size).
Thank you!
I understand that denser DRAM spends more time refreshing than 'less dense DRAM', in terms of operating time (read/write) vs. refresh time. Example: a 64GB DIMM can be expected to 'lose more bandwidth waiting for refresh' than a 32GB or 16GB DIMM.
Does this increasing refresh time with density present a limit on how densely we can scale DRAM? .. or is this something that gets worked around with finer granularity on refresh timing, or other tricks in the future?
(I also assume 3D DRAM isn't really phased by this since each stack will potentially refresh at the same time - reducing the # of rows/cycles that must refresh at once, per GB size).
Thank you!