Dell
Dell PowerEdge M610 Technical Guide
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7.3
Memory Features
Key features of the M610 memory system include:
Registered (RDIMM) and Unbuffered (UDIMM) ECC DDR3 technology
Each channel carries 64 data and eight ECC bits
Support for up to 192 GB of RDIMM memory (with twelve 16 GB RDIMMs)
Support for up to 24 GB of UDIMM memory (with twelve 2 GB UDIMMs)
Support for 1066/1333 MT/s single and dual rank DIMMs
Support for 1066 MT/s quad rank DIMMs
Single DIMM configuration only with DIMM in socket A1
ODT support (On Die Termination)
Clock gating (CKE) to conserve power when DIMMs are not accessed (DIMMs enter a low-
power self-refresh mode)
I
2
C 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
Memory sparing is not supported on 5500 series processors but it is supported on systems using 5600
series processors. While 800 MT/s DIMMs are not supported, the installation of two quad-rank 1066
MT/s DIMMs will operate at 800 MT/s.
7.4
Memory Speed Limitations
The memory frequency is determined by a variety of inputs:
Speed of the DIMMs
Speed supported by the processor
Configuration of the DIMMs
The M610 supports two DIMMs per channel at 1333 MT/s. To run the maximum memory configuration
(12 x 16 GB DIMMS = 192 GB) at 1333 MT/s, use dual-rank 16 GB DIMMs.
If you want to run at 1066MT/s, the maximum amount of quad-rank DIMMs allowed is 1DPC (DIMM per
channel), which equals three DIMMs per CPU or six DIMMs total.
For quad-rank DIMMs mixed with single- or dual-rank DIMMs, the quad-rank DIMM needs to be in the
slot with the white ejection tabs (the first DIMM slot in each channel). There is no requirement for
the order of single-rank and dual-rank DIMMs.
Table 7 shows the memory populations and the maximum frequency achievable for that
configuration.
