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X8DA6/X8DAE User's Manual
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1.35V DIMMs
1.35V RDIMM Population for the Motherboard w/5600 Processors
DIMM
DIMMs
Slots per
Populated
Channel
per Channel
2
1
2
1
2
2
2
2
Note 1: 1333/1066 QR RDIMMs MHz will run at 800 MHz (-BIOS automatic downgrading)
Note 2: 1333 SR/DR RDIMMs MHz will run at 800 MHz (-BIOS automatic downgrading)
Note 3: 1333 SR/DR/QR RDIMMs MHz will run at 800 MHz (-BIOS automatic downgrading)
Note 4: MIxing of 1.35V and 1.5V DIMMs is not recommended.
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 dispropor-
tional. (See the following Memory Availability Table.)
System Device
Firmware Hub flash 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-MB boundary-
VGA Memory
TSEG
Memory available for the OS & other
applications
Installed
DIMM Type (Reg.=
Registered)
Reg. DDR3 ECC
Reg. DDR3 ECC
Reg. DDR3 ECC
Reg. DDR3 ECC
Possible System Memory Allocation & Availability
Size
1 MB
4 KB
2 MB
4 KB
256 MB
256 MB
512 MB
16 MB
1 MB
2-10
Speeds (in MHz)
Ranks per DIMM
(any combination;
SR=Single Rank,
DR=Dual Rank,
QR=Quad Rank)
800,1066,1333
SR or DR
800 (Note 1)
QR
800,1066 (Note 2)
Mixing SR, DR
800 (Note 3)
Mixing SR, DR, QR
Physical Memory
Remaining (-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
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