Chapter 2: Installation
2-13
Possible System Memory Allocation & Availability
System Device
Size
Physical Memory
Remaining (-Available)
(4 GB Total System
Memory)
Firmware Hub flash memory (System BIOS)
1 MB
3.99
Local APIC
4 KB
3.99
Area Reserved for the chipset
2 MB
3.99
I/O APIC (4 Kbytes)
4 KB
3.99
PCI Enumeration Area 1
256 MB
3.76
PCI Express (256 MB)
256 MB
3.51
PCI Enumeration Area 2 (if needed) -Aligned on 256-MB
boundary-
512 MB
3.01
VGA Memory
16 MB
2.85
TSEG
1 MB
2.84
Memory available to OS and other applications
2.84
When installing memory modules, the DIMM slots should be populated in the following
order: DIMMA2, DIMMB2, then DIMMA1, DIMMB1.
•
Always use DDR3 DIMM modules of the same size, type and speed.
•
Mixed DIMM speeds can be installed. However, all DIMMs will run at the speed
of the slowest DIMM.
Recommended Population (Balanced)
DIMMA2
DIMMB2
DIMMA1
DIMMB1
Total System Memory
2GB
2GB
4GB
2GB
2GB
2GB
2GB
8GB
4GB
4GB
8GB
4GB
4GB
4GB
4GB
16GB
8GB
8GB
16GB
8GB
8GB
8GB
8GB
32GB
