Technical Product Specification

Functional Architecture Overview Intel® Server Board S2600CO Family TPS
26 Revision 1.6
Intel order number G42278-004
 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.
 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.
Note: Some server operating systems do not display the total physical memory installed. What
is displayed is the amount of physical memory minus the approximate memory space used by
system BIOS components. These BIOS components include, but are not limited to:
 ACPI (may vary depending on the number of PCI devices detected in the system)
 ACPI NVS table
 Processor microcode
 Memory Mapped I/O (MMIO)
 Manageability Engine (ME)
 BIOS flash
3.2.2.4 Integrated Memory Controller Operating Modes
3.2.2.4.1 Independent Channel Mode
Channels can be populated in any order in Independent Channel Mode. All four channels may
be populated in any order and have no matching requirements. All channels must run at the