Installing the cooling-fan assemblyPrerequisitesCAUTION: Many repairs may only be done by a certified service technician. You should onlyperform troubleshooting and simple repairs as authorized in your product documentation, or asdirected by the online or telephone service and support team. Damage due to servicing that isnot authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat came with the product.1. Ensure that you read the Safety instructions.2. Follow the procedure listed in Before working inside your system.CAUTION: Ensure that the cables are correctly installed and retained by the cable retentionbracket before installing the cooling-fan assembly. Incorrectly installed cables may get damaged.Steps1. Align the cooling-fan assembly slots with the guide pins on the chassis.2. Slide the cooling-fan assembly into the chassis.3. Lock the cooling-fan assembly into the chassis by lowering the release levers until firmly seated.Next stepsFollow the procedure listed in After working inside your system.System memoryYour system supports DDR4 registered DIMMs (RDIMMs), and load reduced DIMMs (LRDIMMs).NOTE: MT/s indicates DIMM speed in MegaTransfers per second.Memory bus operating frequency can be 1333 MT/s, 1600 MT/s, 1866 MT/s, or 2133 MT/s depending onthe following factors:• 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 processorsThe system contains 24 memory sockets split into two sets of 12 sockets, one set per processor. Each 12-socket set is organized into four channels. In each channel, the release levers of the first socket aremarked white, the second socket black, and the third socket green.NOTE: DIMMs in sockets A1 to A12 are assigned to processor 1 and DIMMs in sockets B1 to B12 areassigned to processor 2.74
