Intel S2600CO Family Technical Product Specification page 36

Intel® Server Board S2600CO Family TPS
The following are generic DIMM population requirements that generally apply to the Intel
Server Board S2600CO.
All DIMMs must be DDR3 DIMMs

Unbuffered DIMMs can be ECC or non-ECC. However, Intel

supports ECC memory for its server products.
Mixing of Registered and Unbuffered DIMMs is not allowed per platform.

Mixing of LRDIMM with any other DIMM type is not allowed per platform.

Mixing of DDR3 voltages is not validated within a socket or across sockets by Intel. If

1.35V (DDR3L) and 1.50V (DDR3) DIMMs are mixed, the DIMMs will run at 1.50V.
Mixing of DDR3 operating frequencies is not validated within a socket or across sockets

by Intel. If DIMMs with different frequencies are mixed, all DIMMs will run at the common
lowest frequency.
Quad rank RDIMMs are supported but not validated by Intel.

A maximum of 8 logical ranks (ranks seen by the host) per channel is allowed.

Mixing of ECC and non-ECC DIMMs is not allowed per platform.

DIMMs with different timing parameters can be installed on different slots within the

same channel, but only timings that support the slowest DIMM will be applied to all. As a
consequence, faster DIMMs will be operated at timings supported by the slowest DIMM
populated.
When one DIMM is used, it must be populated in the BLUE DIMM slot (farthest away

from the CPU) of a given channel.
When single, dual and quad rank DIMMs are populated for 2DPC, always populate the

higher number rank DIMM first (starting from the farthest slot), for example, first quad
rank, then dual rank, and last single rank DIMM.
Mixing of quad ranks DIMMs (RDIMM Raw Cards F and H) in one channel is not

validated.
3.2.2.3 Publishing System Memory
The BIOS displays the "Total Memory" of the system during POST if Display Logo is

disabled in the BIOS setup. This is the total size of memory discovered by the BIOS
during POST, and is the sum of the individual sizes of installed DDR3 DIMMs in the
system.
The BIOS displays the "Effective Memory" of the system in the BIOS setup. The term

Effective Memory refers to the total size of all DDR3 DIMMs that are active (not
disabled) and not used as redundant units.
The BIOS provides the total memory of the system in the main page of the BIOS setup.

This total is the same as the amount described by the first bullet above.
If Display Logo is disabled, the BIOS display the total system memory on the diagnostic

screen at the end of POST. This total is the same as the amount described by the first
bullet above.
Revision 1.0
Intel order number G42278-002
Functional Architecture Overview
®
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only validates and
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