S875WP1-E TPS
Functional Architecture
Revision 4.0
7
Table 3 lists the supported system bus frequency and memory speed combinations.
Table 3. Supported System Bus Frequency and Memory Speed Combinations
To use this type of DIMM…
The processor's system bus frequency must be…
PC3200 (400 MHZ)
800 MHz
PC2700 (333 MHZ)
800 or 533 MHz (Note)
PC2100 (266 MHZ)
800, 533, or 400 MHz
Note:
When using PC2700 (333 MHZ) memory with an 800 MHz system bus frequency processor, the memory
channel will be set to 320 MHz.
Only DIMMs tested and qualified by Intel or a designated memory test vendor will be supported
on the Intel Server Board S875WP1-E. A list of qualified DIMMs will be made available through
http://support.intel.com/support/motherboards/server/S875WP1-E/
. Note that all DIMMs are
supported by design, but only fully qualified DIMMs will be supported.
NOTES
•
Remove the AGP video card while installing or upgrading memory to avoid interference
with the memory retention mechanism.
•
To be fully compliant with all applicable DDR SDRAM memory specifications, the board
should be populated with DIMMs that support the Serial Presence Detect (SPD) data
structure. This allows the BIOS to read the SPD data and program the chipset to
accurately configure memory settings for optimum performance. If non-SPD memory is
installed, the BIOS will attempt to correctly configure the memory settings, but
performance and reliability may be impacted or the DIMMs may not function under the
determined frequency.
•
For ECC functionality, all installed DIMMs must be ECC. If both ECC and non-ECC
DIMMs are used, ECC will be disabled and will not function.
•
Only low profile DIMMs can be supported in a 1U server chassis.
3.1.3 Memory
Configurations
The Intel 82875P MCH component provides two features for enhancing memory throughput:
•
Dual Channel memory interface. The board has two memory channels, each with two
DIMM sockets.
•
Dynamic Addressing Mode. Dynamic mode minimizes overhead by reducing memory
accesses.