Supermicro X8DTU-LN4F+ User Manual page 38

Motherboard
X8DTU-LN4F+
Note 1: Due to OS limitations, some operating systems may not show
more than 4 GB of memory.
Note 2: 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.)
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 for the OS & other applications
User's Manual
Size Physical
Remaining (-Available)
(4 GB Total System Memory)
1 MB 3.99 GB
4 KB 3.99 GB
2 MB 3.99 GB
4 KB 3.99 GB
256 MB 3.76 GB
256 MB 3.51 GB
512 MB 3.01 GB
16 MB 2.85 GB
1 MB 2.84 GB
2.84 GB
3-12
Memory