Can DDR4 2400 RDIMMs Be used with V3 CPUs? Will it just run 2133 for example with E5 2695 or E5 2673 V3s?
Can DDR4 2400 RDIMMs be used with E5 V3s?
- Thread starter Kneelbeforezod
- Start date
Notice: Page may contain affiliate links for which we may earn a small commission through services like Amazon Affiliates or Skimlinks.
Yes no issues, and I always spec 2400 no matter what v4 CPU I use as well but a lot of v4 still only support 2133.
The real question for me is would anybody notice the difference between 2133 lrdimm 4R and 2400 rdimm 2R in a server... I have a big (10 nodes) vSAN cluster with 512gb in each and wondering if I could really tell the difference if some nodes have different speeds. (All dimm are still 32gb in size)
Depends on a few things... 1 if the Rdimms are actually running at 2133 in that config, and cas.
DDR4 RDIMM and LRDIMM Performance Comparison
I would expect the rdimms to actually be running at 1866 in which case the lrdimms will be faster.
If the rdimms are able to be forced to 2133 or already are at that, they will be faster.
Will you see it? Depends highly on your workloads sensitivity to memory bandwidth and latency.
DDR4 RDIMM and LRDIMM Performance Comparison
I would expect the rdimms to actually be running at 1866 in which case the lrdimms will be faster.
If the rdimms are able to be forced to 2133 or already are at that, they will be faster.
Will you see it? Depends highly on your workloads sensitivity to memory bandwidth and latency.
@Patriot thanks for that little link, done a test I would never probably bother doing, I decided not to mix but that really does confirm that it's probably good I did not mix in the same cluster for same workload. I just shuffled the memory around so different workloads had the same time of memory and probably will never notice any difference.