5. cooling fan connector (6) 6. guide pin on the chassis (6)Next stepsFollow the procedure listed in the After working inside your system section.Related LinksSafety instructionsBefore working inside your systemAfter working inside your systemGUID-77D112E3-72CF-40BF-BCF6-6A61E3A2520DSystem memoryYour system supports DDR4 registered DIMMs (RDIMMs). System memory holds the instructions that areexecuted by the processor.NOTE: MT/s indicates DIMM speed in MegaTransfers per second.Memory bus operating frequency can be 1866 MT/s, 2133 MT/s, or 2400 MT/s depending on thefollowing factors:• DIMM type (RDIMM)• DIMM type (RDIMM or LRDIMM)• Number of DIMMs populated per channel• System profile selected (for example, Performance Optimized, Custom, or Dense ConfigurationOptimized)• Maximum supported DIMM frequency of the processorsYour system contains 24 memory sockets split into two sets of 12 sockets, one set per processor. Each12-socket set is organized into four channels. In each channel, the release tabs of the first socket aremarked white, the second socket black, and the third socket green.75
