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DIMM Module Population Confi guration
For memory to work properly, follow the tables below for memory installation:
DIMM
DIMMs
Slots per
Populated
Channel
per
Channel
2
1
2
1
2
2
2
1
2
2
Note 1: Due to OS limitations, some operating systems may not show more than
4 GB of memory.
Note 2: Due to memory allocation to system devices, the amount of memory that
remains available for operational use will be reduced when 4 GB of RAM is used.
The reduction in memory availability is disproportional.
Possible System Memory Allocation & Availability
System Device
Firmware Hub fl ash memory (System BIOS)
Local APIC
Area Reserved for the chipset
I/O APIC (4 Kbytes)
PCI Enumeration Area 1
PCI Express (256 MB)
PCI Enumeration Area 2 (if needed) -Aligned on 256-M
boundary-
VGA Memory
TSEG
Memory available for the OS & other applications
Chapter 5: Advanced Serverboard Setup
DIMM Population Table
DIMM Type (Reg.=
Registered)
Reg. DDR3 ECC
Reg. DDR3 ECC
Reg. DDR3 ECC
Unb. DDR3 ECC
Unb. DDR3 ECC
Size
1 MB
4 KB
2 MB
4 KB
256 MB
256 MB
512 MB
16 MB
1 MB
5-9
Speeds (in MHz)
SR=Single Rank,
QR=Quad Rank)
1066,1333
1066,1333
1066
Mixing SR, DR, QR
1066,1333
1066,1333
Physical Memory Available
(4 GB Total System
Memory)
3.99 GB
3.99 GB
3.99 GB
3.99 GB
3.76 GB
3.51 GB
3.01 GB
2.85 GB
2.84 GB
2.84 GB
Ranks per
DIMM (any
combination;
DR=Dual Rank,
SR or DR
QR
SR or DR
Mixing SR, DR
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