Supermicro X7DBR-3, User Manual

Page: 27 / 131

Chapter 2: Installation
2-7
®
S
UPER X7DBR-3/E
To Install:
Insert module vertically and press down until it
snaps into place. Pay attention to the alignment notch at
the bottom.
Installing and Removing DIMMs
2 FBD
To Remove:
Use your thumbs to
gently push the re-
lease tabs near both
ends of the module.
This should release
it from the slot.
2 FBD Slot
*Note 2
: Due to memory allocation to system devices, memory remaining avail-
able for operational use will be reduced when 4 GB of RAM is used. The reduction
in memory availability is disproportional. (Refer to the Memory Availability Table
below for details.)
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 3.99
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 OS &
other applications 2.84