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SE7221BK1-E Technical Product Specification
7
The maximum memory capacity is 4 GB
Note* Although the Intel® Server Board SE7221BK1-E supports a maximum memory
capacity of 4 GB, system resources consume roughly 750 MB of physical memory in the
maximum memory configuration. As a result, when 4 GB of memory is used, the amount of
memory made available to the operating system is significantly lower than 4 GB; roughly
3200 MB. THIS IS ONLY AN ISSUE WHEN 4 GB OF MEMORY IS USED. A memory
configuration of less than 4 GB will not be susceptible to this issue. Please refer to Intel®
Technical Advisory TA 719-01 on the support web site located at
http://support.intel.com/support/motherboards/server/SE7221BK1E
.
The minimum memory capacity is 256 MB via 1 x 256 MB DIMM module
3.2.1.2 Memory Configuration
The memory interface between the GMCH and the DIMMs is 64-bit (non-ECC) or 72-bit (ECC)
wide interface.
There are two banks of DIMMs, labeled 1 and 2. Bank 1 contains DIMM socket locations
DIMM_1A and DIMM_2A. Bank 2 contains DIMM socket locations DIMM_1B and DIMM_2B.
The sockets associated with each bank or “channel”, are located next to each other and the
DIMM socket identifiers are marked on the baseboard silkscreen, near the DIMM socket. Bank 1
is associated with Memory Channel A while Bank 2 is associated with Memory Channel B.
When only two DIMM modules are being used, the population order must be DIMM_1A,
DIMM_1B to ensure dual channel operating mode.
To reiterate: In order to operate in Dual Channel Dynamic Paging Mode, the following conditions
must be met:
• 2 identical DIMMs are installed, one each in DIMM_1A and DIMM_1B
• 4 identical DIMMs are installed (one in each socket location)
Installing only 3 DIMMs is not supported. Do not use DIMMs that are not “matched”
(same type and speed). Use of identical memory parts is always the preferred method.
See Table 2 and Figure 2 on the following page for reference.
The system design is free to populate or not to populate any rank on either channel, including
either degenerate single channel case.
DIMM and memory configurations must adhere to the following:
DDR2 400/533 , un-buffered, DDR2 DIMM modules
DIMM organization: x72 ECC or x 64 Non-ECC
Pin count: 240
DIMM capacity: 256 MB, 512 MB, 1 GB DIMMs
Serial PD: JEDEC Rev 2.0
Voltage options: 1.8 V
Interface: SSTL2