Intel® Server Board SE7505VB2
Functional Architecture
3.1.2.2 Memory
Configuration
The memory interface between the MCH and the DIMMs is 144-bits wide (72-bits for each
bank).
There are two banks of DIMMs, labeled 1 and 2. Bank 1 contains DIMM socket locations 1A and
1B. Bank 2 contains 2A and 2B. The sockets associated with each bank are located next to
each other and the DIMM socket identifiers are marked on the baseboard silkscreen, near the
DIMM socket.
For designs that require a lower price point, a single 128 MB DIMM can be populated in the
DIMM1A socket. When a single DIMM is installed, interleaving and Intel x4 SDDC are not
available. Bank 2 will only operate with two DIMMs installed.
The baseboard’s signal integrity and cooling are optimized when memory banks are populated
in order. Before populating either DIMM socket in bank 2, both DIMMs in bank 1 must be
populated. No empty DIMM sockets are allowed between populated DIMMs.
DIMM and memory configurations must adhere to the following:
DDR266 ECC, registered, DDR DIMM modules
DIMM organization: x72 ECC
Pin count: 184
DIMM capacity: 128 MB, 256 MB, 512 MB, 1 GB, 2GB DIMMs
Serial PD: JEDEC Rev 2.0
Voltage options: 3.3 V (VDD/VDDQ)
Interface: SSTL2
3.1.2.3 Memory
Cooling
The SE7505VB2 server board supports DDR memory in a variety of sizes and densities (see
Table 4). Due to the specific orientation of the memory on the SE7505VB2 server board,
certain memory densities and configurations are more difficult to cool in chassis that provide
traditional front to back airflow such as the Intel SC5200 and SC5250-E server chassis. To
ensure the memory used with this board has sufficient thermal margin to operate within
specifications, Intel has designed a memory cooling duct specifically for the SE7505VB2 server
board. Intel’s testing has shown only 2GB and stacked 1GB (low profile) DIMMs are thermally
at risk. If your specific design uses either of these size memory parts, contact Intel Customer
Support and request the SE7505VB2 server board memory cooling duct, part number C28482-
001.
Revision 1.2
Intel part number C32194-002
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