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  | Chapter 2: Installation  | 
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Table 2 - DDR3 ECC Registered (RDIMM) Memory Support | ||
RDIMM | 1Gb (x8 DRAM) | 2Gb (x8 DRAM)  | 
Single Rank  | Up to 6GB  | Up to 12GB  | 
  | (6 x 1GB DIMM Modules)  | (6 x 2GB DIMM Modules)  | 
Dual Rank  | Up to 12GB  | Up to 24GB  | 
  | (6 x 2GB DIMM Modules)  | (6 x 4GB DIMM Modules)  | 
Quad Rank  | Up to 16GB  | Up to 32GB  | 
  | (4 x 4GB DIMM Modules)**  | (4 x 8GB DIMM Modules)**  | 
Note: All other memory sizes, types, die, density, that are not listed in these tables are NOT supported. **For Quad Rank RDIMMs, only Slot 1 and Slot 2 are
populated per channel.
Slot 1, Channel B
(Blue colored)
Slot 2, Channel B
Slot 3, Channel B
DDR3 1066/1333 UDIMM/RDIMM required
DIMM1C DIMM1B DIMM1A DIMM2C DIMM2B DIMM2A
FAN
 Slot 1, Channel A
(Blue colored)
 Slot 2, Channel A
 Slot 3, Channel A
Figure A
Memory Population Guidelines
Please follow the tables below when populating the 
DDR3 ECC UDIMM Memory
DIMM Slots  | DIMMs  | DIMM Type  | POR Speeds  | Ranks per DIMM  | 
per Channel  | Populated | 
  | 
  | (any combination) | 
  | per Channel | 
  | 
  | 
  | 
3  | 1  | Unbuffered  | 1066, 1333  | Single Rank, Dual  | 
  | 
  | DDR3 ECC  | 
  | Rank  | 
3  | 2  | Unbuffered  | 1066, 1333  | Single Rank, Dual  | 
  | 
  | DDR3 ECC  | 
  | Rank  | 
3  | 3  | N/A  | Not Supported  | Single Rank, Dual  | 
  | 
  | 
  | 
  | Rank  | 
Note: For ECC UDIMMs , only Slot 1 and/or Slot 2 may be populated per chan- nel.