Chapter 2: Installation
2-7
Note:
Due to memory allocation to system devices, the amount of mem-
ory that remains available for operational use will be reduced when 4 GB
of RAM is used. The reduction in memory availability is disproportional.
See the following table for details.
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
