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Server Board Installation and Upgrades 49
Installing and Removing Memory
The S875WP1-E server board contains four 184-pin DIMM sockets and supports up to four DDR
SDRAM DIMMs. The minimum supported memory configuration is 128 MB, using one DIMM in
DIMM socket 1A. The maximum configurable memory size is a 4 GB, using four 1 GB stacked
unbuffered DDR266/333/400 ECC DIMMs.
The silkscreen on the board for the DIMMs displays DIMM1A, DIMM2A, DIMM1B, and
DIMM2B, starting from the inside of the board. The DIMM1A is the socket closest to the
processor socket. One, two, or four DIMMs may be used at a time.
For dual-channel interleave, a minimum of two DIMMs must be installed and the DIMMs must be
populated as follows:
• DIMM1A and DIMM 1B: Populate these two sockets together first
• DIMM 2A and DIMM 2B: Populate these sockets in addition to DIMM 1A and DIMM 2A if
four DIMMs are to be used
When four DIMMs are installed, the system will use dual-channel interleave. For single-channel
memory, a single DIMM can be installed in socket DIMM 1A. For single-channel memory using
two DIMMs, populate the DIMM sockets in the following order:
• DIMM1A: Populate this socket if a single DIMM is to be installed
• DIMM2A: Populate this socket and the DIMM1A socket if two DIMMs are to be used
Check the Intel Customer Support website for the latest tested memory list:
http://support.intel.com/support/motherboards/server/S875WP1-E
DIMM Installation Guidelines
All memory components and DIMMs used with the server board S875WP1-E must comply with
the DDR specifications.