Your system supports DDR3 registered DIMMs (RDIMMs) or unbuffered ECC DIMMs (UDIMMs). Single and dual-rank DIMMs can be 1067- or 1333-MHz, and quad-rank DIMMs can be 800- or 1067-MHz.
Your system supports single-channel mode and dual-channel mode.
The system contains a total of six memory sockets. UDIMM supports single-rank and dual-rank DIMMs. Only RDIMM supports quad-rank DIMMs.
The maximum memory that is supported on your system varies according to the types and sizes of memory modules being used:
Single-rank and dual-rank RDIMMs of sizes 2-GB, 4-GB and 8-GB are supported for a total of up to 24 GB.
Quad-rank RDIMMs are supported for a total of up to 32 GB.
1-GB and 2-GB UDIMMs are supported for a total of up to 8 GB.
General Memory Module Installation Guidelines
To ensure optimal performance of your system, observe the following general
guidelines when configuring your system memory.
NOTE: Memory configurations that fail to observe these guidelines can prevent
your system from starting and producing any video output.
RDIMMs and UDIMMs cannot be mixed.
Except for memory channels that are unused, all populated memory channels must have identical configurations.
Memory modules of different sizes can be mixed in A1-A3 or B1-B3
(for example, 2-GB and 4-GB), but all populated channels must have
identical configurations.
The memory speed of each channel depends on the memory configuration:
For single- or dual-rank memory modules:
One memory module per channel supports up to 1333 MHz.
Two memory modules per channel support up to 1333 MHz.
Three memory modules per channel support up to 800 MHz.
For quad-rank memory modules:
One memory module per channel supports up to 1067 MHz.
Two memory modules per channel are limited to 800 MHz, regardless of memory module speed.
If quad-rank memory modules are mixed with single- or dual-rank modules, the quad-rank modules must be installed in the sockets with the white release levers.
If memory modules with different speeds are installed, they will operate at the speed of the slowest installed memory module(s).
Mode-Specific Guidelines
There are two memory channels with each channel supporting a maximum of three RDIMMs and two UDIMMs.
Table 3-1 and Table 3-2 show sample memory configurations that follow the appropriate memory guidelines stated in this section. The samples show identical memory-module configurations and the physical and available memory totals. The tables do not show mixed or quad-rank memory-module configurations, nor do they address the memory speed considerations of any configuration.
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