ECC DDR4 - you mean RDIMM right ?should this work? Or even 2133?
Yes RDIMM, just wondering if Rome will work with 2133 or 2400. I need buckets of RAM on the cheap and lower latency more than big fat bandwidthECC DDR4 - you mean RDIMM right ?
best is 2666 but better 2400 than 2133
2400 is degraded to 2133 if you install two DIMM per channel.
Thanks for that info, I got a very good deal on a set of 2133 DIMMS as the price jump (nearly 2x) didn't justify the cost for me to go to 2400 much less 3200. I got these 64GB dimms for $55 each so I loaded the boat. I figured more channels would beat out higher speed with fewer dimms anyway.Works fine with 2400, I've never tested 2133. Rome is sensitive to memory speeds though, since FCLK scales with memory speed; I think this may be the only time in...recorded history where memory speed and channel population can make a tangible (>a few %) impact on performance.
Xeons behave well as you scale the channel count and memory clocks but Rome exhibits pathologies, I briefly had a Rome system with only 5 channels populated and one of my homegrown HPC codes (which was not bandwidth-sensitive) lost half its performance. Such is the hazard with buying AMD...