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H8DGT-HLF/HLIBQF Serverboard User's Manual
-For a Motherboard with One CPU (CPU1) Installed
# DIMMS
4 DIMMs
-For a Motherboard with Two CPUs (CPU1 & CPU2) Installed
# DIMMS
8 DIMMs
DIMM Module Population Confi guration
For memory to work properly, follow the tables below for memory installation:
DIMM Type
Unbuffered
DIMM
Registered
DIMM
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
Memory Population for Optimal Performance
CPU
Channel 1
CPU1
P1-1A
Memory Population for Optimal Performance
CPU
Channel 1
CPU1
P1-1A
CPU2
P2-1A
Per Channel DIMM Populations Options
DIMM A
1.5V DIMMs
SR or DR
SR or DR
QR
Channel 2
Channel 3
P1-2A
Channel 2
Channel 3
P1-2A
P2-2A
Max. MHz,
Max. MHz,
1.35V DIMMs
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1333 MHz
1066 MHz
Size
Physical Memory Available
(4 GB Total System
Memory)
1 MB
3.99 GB
4 KB
3.99 GB
2 MB
3.99 GB
4 KB
3.99 GB
256 MB
3.76 GB
256 MB
3.51 GB
512 MB
3.01 GB
16 MB
2.85 GB
1 MB
2.84 GB
2.84 GB
2-6
Channel 4
P1-3A
P1-4A
Channel 4
P1-3A
P1-4A
P2-3A
P2-4A
Max. GB/
Channel
4 GB
16 GB
16 GB
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