User Manual

Dell
PowerEdge R610 Technical Guide 28
7 Memory
7.1 Overview
The PowerEdge R610 uses DDR3 memory, providing a high-performance, high-speed memory
interface capable of low latency response and high throughput. The R610 supports Registered ECC
DDR3 DIMMs (RDIMM) or Unbuffered ECC DDR3 DIMMs (UDIMM).
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.
Key features of the PowerEdge R610 memory system include:
• Registered (RDIMM) and Unbuffered (UDIMM) ECC DDR3 technology
• Support for up to 192 GB of RDIMM memory (twelve 16 GB RDIMMs)
• Support for up to 24 GB of UDIMM memory (twelve 2 GB UDIMMs)
• 64 data and eight ECC bits per channel
• Support for 1066/1333 MT/s single- and dual- rank DIMMs
• Support for 1066 MT/s quad-rank DIMMs
• Support for 1.35V low voltage (LV) DIMMs with 5600 series processors
• Support for single DIMM configuration (DIMM in socket A1 only)
• Support for ODT (On Die Termination) clock gating (CKE) to conserve power when DIMMs are
not accessed (DIMMs enter a low power self-refresh mode)
• I2C access to SPD EEPROM for access to RDIMM thermal sensors
• Single Bit Error Correction
• SDDC (Single Device Data Correction, x4 or x8 devices)
• Support for Closed Loop
• Thermal Management on RDIMMs and UDIMMs
• Multi Bit Error Detection Support for Memory Optimized Mode
• Support for Advanced ECC mode
• Support for Memory Mirroring
• Support for Memory Sparing with 5600 series processors
7.2 DIMMs Supported
The DDR3 memory interface consists of three channels with up to two RDIMMs or UDIMMs per channel
for single or dual rank and up to two RDIMMs per channel for quad rank. The interface uses 2 GB, 4
GB, 8 GB, or 16 GB RDIMMs. Also supported are 1 GB or 2 GB UDIMMs.
7.2.1 Memory Modes
The memory mode is dependent on how the memory is populated in the system, according to the
following configurations:
• Three channels per processor populated identically
• Dual-processor configuration with the memory configurations for each processor being
identical
o Typically, the system will be set to run in Memory Optimized (Independent Channel)
mode in this configuration.
o This mode offers the most DIMM population flexibility and system memory capacity,
but offers the least number of RAS (reliability, availability, service) features.
o Memory modules are installed in numeric order for the sockets beginning with A1 or
B1.