It looks like the DIMMs you're using are RDIMMs and not LRDIMMs. All the DIMMs I'm seeing for this capacity are LRDIMMs. The manual indicates that 16GB RDIMMs are not supported, so I would suspect that 32GB RDIMMs would not be, either. I would use the 768GB config from the sample document page. The only difference I see is the use of LRDIMMs, as opposed to LRDIMMs.   [IMAGE]   R720XD Manual (sample memory config page) [URL]   If you don't mind sharing a SupportAssist collection form the iDRAC, you're welcome to PM me. We can work out a way for you to share that and I can see if the logs offer any additional detail about the memory error.
Hello,So, i have an R720XD server and im trying to get 768GB RAM Memory (24x32GB) and, when i put 16x32 memory, its everything okay, server telling me I have 512GB RAM Memory, but when i start added another rams, to the "Green slots" amount of ram start goes to random (386GB/256GB) and i just cant get more than 512GB ram, i use 2xE5-2690v2, bios is the nevest (2.9.0) and memory what i use is all 24 pieces of 32GB 4Rx4 PC3L-10600R-9-12-AB0. HMT84GR7MMR4A - H9 D8 AG . Any ideas why? Of course idrac didnt post any troubles, but im getting message from start. That "Warning: The number of ranks on this device is not supported." So, how can i get 768GB Ram when 32GB memory stick have 4Rx4 or 4Rx8 ?
R720XD can't get 768GB Memory.