Supero PDSLM, User Manual

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Chapter 2: Installation
2-7
2-4 Installing DDR2 Memory
Memory Support
The PDSLM supports up to 4 GB of Dual channel, Non-ECC unbuffered DDR2
667/533/400 SDRAM.
Important Notes on Memory Support
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. (Refer to the Memory Avail-
ability Table below for details.)
SO-DIMMA
Possible System Memory Allocation & Availability
System Device Size Physical Memory
Remaining (-Available)
(4 GB Total System Memory)
Firmware Hub fl ash memory (System
BIOS) 1 MB 3.99GB
Local APIC 4 KB 3.99GB
Area Reserved for the chipset 2 MB 3.99GB
I/O APIC (4 Kbytes) 4 KB 3.99GB
PCI Enumeration Area 1 256 MB 3.76GB
PCI Express (256 MB) 256 MB 3.51GB
PCI Enumeration Area 2 (if needed)
-Aligned on 256-MB boundary- 512 MB 3.01GB
VGA Memory 16 MB 2.85GB
TSEG 1 MB 2.84GB
Memory available for the OS & other
applications 2.84GB