Installing The Cooling ShroudCAUTION: Many repairs may only be done by a certified service technician. You should only performtroubleshooting and simple repairs as authorized in your product documentation, or as directed by the online ortelephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by yourwarranty. Read and follow the safety instructions that came with the product.NOTE: For proper seating of the cooling shroud in the system chassis, ensure that the cables inside the system arerouted along the chassis wall and secured using the cable securing bracket.1. Align the tabs on the cooling shroud with the securing slots on either side of the chassis.2. Lower the cooling shroud into the chassis until it is firmly seated.3. Close the system.4. Reconnect the system to its electrical outlet and turn the system on, including any attached peripherals.System MemoryYour system supports DDR3 unbuffered ECC DIMMs (ECC UDIMMs), registered DIMMs (RDIMMs), and load reducedDIMMs (LRDIMMs). It supports DDR3 and DDR3L voltage specifications.NOTE: MT/s indicates DIMM speed in MegaTransfers per second.Memory bus operating frequency can be either 800 MT/s, 1066 MT/s , 1333 MT/s, or 1600 MT/s depending on the:• DIMM type (UDIMM, RDIMM, or LRDIMM)• DIMM configuration (number of ranks)• Maximum frequency of the DIMMs• Number of DIMMs populated per channel• DIMM operating voltage• System profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized)• Maximum supported DIMM frequency of the processorsThe system contains 48 memory sockets split into four sets of 12 sockets, one set per processor. Each 12-socket set isorganized into four channels. In each channel, the release levers of the first socket are marked white, the second socketblack, and the third socket green.NOTE: DIMMs in sockets A1 to A12 are assigned to processor 1, B1 to B12 to processor 2, C1 to C12 to processor 3,and D1 to D12 to processor 4.41
