Dell PowerEdge R610 Hardware Owner's Manual - Page 116

System Memory Your system supports DDR3 registered DIMMs (RDIMMs) or unbuffered ECC DIMMs (UDIMMs). Single and dual-rank DIMMs can be 1067- or 1333-MHz, and quad-rank DIMMs can be 1067-MHz. The system contains 12 memory sockets split into two sets of six sockets, one set per each processor. Each six-socket set is organized into three channels of two memory sockets per channel. The first socket of each channel is marked with white release levers. The maximum memory that is supported on your system varies according to the types and sizes of memory modules being used: • RDIMMs of sizes 2-GB, 4-GB, and 8-GB are supported for a total of up to 96 GB. • 1-GB and 2-GB UDIMMs are supported for a total of up to 24 GB. General Memory Module Installation Guidelines To ensure optimal performance of your system, observe the following general guidelines when configuring your system memory. NOTE: Memory configurations that fail to observe these guidelines can prevent your system from starting and producing any video output. • RDIMMs and UDIMMs cannot be mixed. • In a dual-processor configuration, the memory configuration for each processor must be identical • For Optimizer Mode, memory modules are installed in the numeric order of the sockets beginning with A1 or B1. • For Memory Mirroring or Advanced ECC Mode, the three sockets furthest from the processor are unused and memory modules are installed beginning with socket A2 or B2 and proceeding in the following order: A2, A3, A5, and A6). • Advanced ECC Mode requires x4 or x8 DRAM device widths. • The memory speed of each channel depends on the memory configuration: - For single or dual-rank memory modules: • One memory module per channel supports up to 1333 MHz. 116 Installing System Components