On Wed, Mar 17, 2021 at 2:15 PM R C <cjvijf at gmail.com> wrote: > Hello, > > > I installed 72G ram in a Dell (it canhandle 72G according to Dell). The > BIOS says there are 9 8G DIMMs install (BIOS test shows no errors). > dmidecode says there are indeed 9 DIMMs, and they show all fine, no > errors etc. However, free reports tehre's only 54G available. What DIMM manufacture model number are the DIMMs? What “rank” are those models? What CPU is installed? How many CPUs? What model server/chipset? What slots were the DIMMs installed in? Higher rank DIMMs will usually show less/half size if installed in the same “channel” with lower rank in DIMMS before the higher rank DIMMs.