Supermicro SuperO A1SAM-2750F User Manual page 27

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 dispropor-
tional. See the following table for details.
Possible System Memory Allocation & Availability
System Device
Firmware Hub flash 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
Size
1 MB
4 KB
2 MB
4 KB
256 MB
256 MB
512 MB
16 MB
1 MB
2-7
Chapter 2: Installation
Physical Memory
Remaining (-Available)
(4 GB Total System
Memory)
3.99
3.99
3.99
3.99
3.76
3.51
3.01
2.85
2.84
2.84