
Hardware options installation 25
Item Description Definition
4
Memory speed 10600 = 1333-MHz
8500 = 1066-MHz
5
DIMM type R = RDIMM (registered)
E = UDIMM (unbuffered with ECC)
For the latest supported memory information, see the QuickSpecs on the HP website (http://www.hp.com).
General DIMM slot population guidelines
• The HP ProLiant DL120 G6 Server has six memory slots.
• There are two channels per server with three DIMM slot per channel.
• Memory channel 1 consists of the three (3) DIMMs that are closest to the processor
• Memory channel 2 consists of the three (3) DIMMs that are furthest from the processor
• Different types of processors have different types of memory support.
• The server supports up to 12 GB (6 x 2-GB) for Registered Memory configurations.
• The server supports up to 16 GB (4 x 4-GB) for Unbuffered Memory configurations.
Observe the following guidelines when installing DIMMs:
• Do not mix Unbuffered and Registered PC3 DIMMs.
• Do not mix DIMMs of varying speeds.
• Do not mix DIMMs of varying voltages.
• Do not mix Unbuffered memory (UDIMMs) with Registered memory (RDIMMs).
• Do not install DIMMs if the processor is not installed.
• Populate DIMMs from heaviest load (double-rank) to lightest load (single-rank) within a channel.
• Heaviest load (DIMM with most ranks) within a channel goes furthest from the CPU.
• Non-ECC DIMMs are not supported
• Each channel supports up to two Unbuffered DIMMs.
• When using UDIMMs, use ECC only.
• When possible, balance the loads per channel.
• If quad-rank DIMMs are installed for the processor, a maximum of two DIMMs can be installed on each
channel for that processor.
• If a channel contains quad-rank DIMMs, the quad-rank DIMM must be installed first on that channel.
• 256MB technology, x4 DRAM on UDIMMs and quad-rank UDIMMs are not supported.
• Always use HP qualified DIMMs.
Populate the DIMM slots in the following sequence:
• DIMM 3A and DIMM 6B
• DIMM 2C and DIMM 5D
• DIMM1E and DIMM 4F
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