2-10
X8DA6/X8DAE User's Manual
1.35V DIMMs
•
1.35V RDIMM Population for the Motherboard w/5600 Processors
Installed
DIMM
Slots per
Channel
DIMMs
Populated
per Channel
DIMM Type (Reg.=
Registered)
Speeds (in MHz)
Ranks per DIMM
(any combination;
SR=Single Rank,
DR=Dual Rank,
QR=Quad Rank)
2
1
Reg. DDR3 ECC
800,1066,1333
SR or DR
2
1
Reg. DDR3 ECC
800 (Note 1)
QR
2
2
Reg. DDR3 ECC
800,1066 (Note 2)
Mixing SR, DR
2
2
Reg. DDR3 ECC
800 (Note 3)
Mixing SR, DR, QR
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.)
Possible System Memory Allocation & Availability
System Device
Size
Physical Memory
Remaining (-Available) (4 GB Total System
Memory)
Firmware Hub fl ash memory (System
BIOS)
1 MB
3.99 GB
Local APIC
4 KB
3.99 GB
Area Reserved for the chipset
2 MB
3.99 GB
I/O APIC (4 Kbytes)
4 KB
3.99 GB
PCI Enumeration Area 1
256 MB
3.76 GB
PCI Express (256 MB)
256 MB
3.51 GB
PCI Enumeration Area 2 (if needed)
-Aligned on 256-MB boundary-
512 MB
3.01 GB
VGA Memory
16 MB
2.85 GB
TSEG
1 MB
2.84 GB
Memory available for the OS & other
applications
2.84 GB
Summary of Contents for X8DA6
Page 1: ...X8DA6 USER S MANUAL Revision 1 0b X8DAE...
Page 5: ...Preface v Notes...
Page 86: ...A 2 X8DA6 X8DAE User s Manual Notes...
