Dell
Dell PowerEdge M610x Technical Guide
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7.3
Memory Features
Key features of the Dell™ PowerEdge™ M610x memory system include:
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Registered (RDIMM) and Unbuffered (UDIMM) ECC DDR3 technology
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Each channel carries 64 data and eight ECC bits
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Support for up to 192 GB of RDIMM memory (with twelve 16 GB RDIMMs)
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Support for up to 24 GB of UDIMM memory (with twelve 2 GB UDIMMs)
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Support for 1066/1333 MT/s single and dual rank DIMMs
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Support for 1066 MT/s quad rank DIMMs
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ODT support (On Die Termination)
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Clock gating (CKE) to conserve power when DIMMs are not accessed (DIMMs enter a low-power
self-refresh mode)
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I
2
C access to SPD EEPROM for access to RDIMM thermal sensors
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Single Bit Error Correction
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SDDC (Single Device Data Correction – x4 or x8 devices)
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Support for Closed Loop Thermal Management on RDIMMs and UDIMMs
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Multi Bit Error Detection
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Support for Memory Optimized Mode
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Support for Advanced ECC mode
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Support for Memory Mirroring
Memory sparing is not supported on 5500 series processors. 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
Speed
The memory frequency is determined by a variety of inputs:
Speed of the DIMMs
Speed supported by the CPU
Configuration of the DIMMs
For quad-rank DIMMs mixed with single- or dual-rank DIMMs, the quad-rank (QR) 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 (SR) and dual-rank (DR) DIMMs.
Table 7 shows the memory populations and the maximum frequency achievable for that
configuration.