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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. See the following table
for details.
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
5-7
Adding PCI Cards
With the optional RSC-RR1U-E8 riser card installed into a PCI-E slot, the 5018A-
MLTN4 can support a full-height half-length PCI Express expansion card. Refer to
Chapter 6 Section 7 for details.
Chapter 5: Advanced Motherboard Setup
Remaining (Available)
Size
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
5-7
Physical Memory
(4 GB Total System
Memory)
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