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To Install: Insert module
vertically and press
down until it snaps into
place. Pay attention to
the alignment notch at
the bottom.
To Remove:
Use your thumbs to
gently push the release
tabs near both ends of
the module. This should
release it from the slot.
Note: 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.
For Microsoft Windows users: Microsoft implemented a design change in the Win-
dows XP with Service Pack 2 (SP2) and Windows Vista. This change is specifi c
to the behavior of Physical Address Extension (PAE) mode which improves driver
compatibility. For more information, please read the following article at Microsoft's
Knowledge Base website at: http://support.microsoft.com/kb/888137.
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-MB
boundary-
VGA Memory
TSEG
Memory available to OS and other applications
Figure 5-3. Installing DIMM into Slot
Notch
Release Tab
Top View of DDR3 Slot
5-9
Chapter 5: Advanced Motherboard Setup
Front View
Note: Notch should align
with the receptive key
point on the slot.
Size
Physical Memory
Remaining (Available)
(4 GB Total System
1 MB
3.99
4 KB
3.99
2 MB
3.99
4 KB
3.99
256 MB
3.76
256 MB
3.51
512 MB
3.01
16 MB
2.85
1 MB
2.84
2.84
Notch
Release Tab
Memory)
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