HP ProLiant DL120 G6 Server - Manual (Page 23)

Hardware options installation 23
Hardware options installation
Introduction
If more than one option is being installed, read the installation instructions for all the hardware options and
identify similar steps to streamline the installation process.
WARNING: To reduce the risk of personal injury from hot surfaces, allow the drives and the
internal system components to cool before touching them.
CAUTION: To prevent damage to electrical components, properly ground the server before
beginning any installation procedure. Improper grounding can cause electrostatic discharge.
Memory options
IMPORTANT: This server does not support mixing RDIMMs and UDIMMs. Attempting to mix
these two types causes the server to halt during BIOS initialization.
The memory subsystem in this server can support RDIMMs or UDIMMs. Both types are referred to as DIMMs
when the information applies to both types. When specified as RDIMM or UDIMM, the information applies
to that type only. All memory installed in the server must be the same type.
The server supports the following DIMM speeds:
• Single- and dual-rank PC3-10600 (DDR-1333) DIMMs operating at 1333 and 1066 MHz
• Quad-rank PC3-8500 (DDR-1067) DIMMs operating at 1066 MHz
Depending on the processor model, the number of DIMMs installed, and whether UDIMMs or RDIMMs are
installed, the memory clock speed may be reduced to 1066 or 800 MHz. For more information on the effect
of DIMM slot population, see "General DIMM slot population guidelines (on page
25 )."
Memory subsystem architecture
The memory subsystem in this server is divided into channels. The processor supports two channels, and each
channel supports three DIMM slots, as shown in the following table.
Channel Slot Slot number
1 E
C
A
1
2
3
2 F
D
B 4
5
6
This server supports both Registered PC3 DIMMs (RDIMMs) and Unbuffered DIMMs (UDIMMs).