SUPER MICRO Computer 5015M-U - Manual (Page 42)

5-8
S UPER S ERVER 5015M-UR/5015M-U/5015M-NTR/5015M-NT User's Manual
Figure 5-3. Installing DIMM into Slot
To Install: Insert module vertically
and press down until it snaps into
place. Pay attention to the bottom
notch.
To Remove: Use your thumbs
to gently push each release tab
outward to free the DIMM from the
slot.
Memory Support
The PDSMU supports up to 8 GB of unbuffered ECC/non-ECC DDR2-667/533/400
SDRAM. Interleaved memory requires modules of the same size and speed to be
installed in pairs. Do not mix DIMMs of different sizes and speeds. Notes: Due to
OS limitations, some operating systems may not show more than 4 GB of memory.
Due to memory allocation to system devices, memory remaining available for op-
erational use will be reduced when 4 GB of RAM is used. The reduction in memory
availability is disproportional. (Refer to the table below for details.)
Possible System Memory Allocation & Availability
System Device Size Physical Memory Remaining
(4 GB Total System Memory)
Firmware Hub fl ash 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 System
BIOS & OS applications 2.84