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A+ SERVER 2022TC-HTRF4 USER'S MANUAL
DIMM Module Population Configuration
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 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
Per Channel DIMM Populations Options
DIMM A
DIMM B
SR or DR
Empty
SR
Empty
DR
Empty
SR or DR
Empty
SR
Empty
SR
SR
DR
Empty
Empty
QR
DR
DR
Max.
MHz, 1.5V
DIMM C
DIMMs
Empty
1600 MHz
SR
1333 MHz
DR
1066 MHz
Empty
1600 MHz
SR
1333 MHz
SR
1066 MHz
DR
1066 MHz
Empty
1066 MHz
DR
800 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
5-10
Max. MHz,
Max. GB/
1.35V DIMMs
Channel
1333 MHz
8 GB
1333 MHz
8 GB
1066 MHz
16 GB
1333 MHz
16 GB
1333 MHz
8 GB
800 MHz
12 GB
1066 MHz
32 GB
800 MHz
32 GB
800 MHz
48 GB
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