
Intel
®
SRMK2 Internet Server Technical Product Specification 30
3.5 Memory
The serverboard has four DIMM sockets. The serial presence detect (SPD) data structure which
is programmed into an E
2
PROM on the DIMM instructs the BIOS on the SDRAM’s size and
speed. The minimum memory size is 64MB; the maximum memory size is 4GB. DIMMs can be
populated in any order, but due to the 25 degree angle of the DIMM socket mountings it is
physically easier to populate DIMMs starting with DIMM0 and moving towards DIMM3.
Memory size can vary between sockets and slot vacancy between DIMMs is permitted. Mixing
of DIMM size is allowed as long as they are all registered DIMMs. For a list of compatible tested
memory please visit the support site at support.intel.com.
The serverboard supports the following memory features:
• 168-pin SPD DIMMs with gold-plated contacts.
• 133 MHz and 100 MHz registered SDRAM DIMMs, 72-bit ECC, 3.3V memory.
• Single- or double-sided DIMMs in the sizes listed in Table 16.
• Registered DIMMs of the following sizes: 64M, 128M, 256M, 512M and 1G for a
maximum memory size of 4 GB. Double stacked DIMMs may only be used if they
are within the 4.33 mm maximum thickness imposed by the 25 degree DIMM socket
spacing on the baseboard.
Table 16: Supported memory sizes and configurations
DIMM
Size
Configuration DRAM
Technology
DRAM
Depth
DRAM
Width
Single-sided
DIMM Size x 64
bit
Double-sided
DIMM Size x 64
bit
64 MB 8 Mbit x 72 64Mb 4Mb 16 bit X 8MB X 8B = 64MB
64 MB 8 Mbit x 72 64Mb 8Mb 8 bit 8MB X 8B = 64MB X
128 MB 16 Mbit x 72 64Mb 8Mb 8 bit X 16MB X 8B = 128MB
128 MB 16 Mbit x 72 64Mb 16Mb 4 bit 16MB X 8B = 128MB X
64 MB 8 Mbit x 72 128Mb 8Mb 16 bit 8MB X 8B = 64MB X
128 MB 16 Mbit x 72 128Mb 8Mb 16 bit X 16MB X 8B = 128MB
128 MB 16 Mbit x 72 128Mb 16Mb 8 bit 16MB X 8B = 128MB X
256 MB 32 Mbit x 72 128Mb 16Mb 8 bit X 32MB X 8B = 256MB
256 MB 32 Mbit x 72 128Mb 32Mb 4 bit 32MB X 8B = 256MB X
64 MB 8 Mbit x 72 256Mb 8Mb 32 bit 8MB X 8B = 64MB X
128MB 16 Mbit x 72 256Mb 8Mb 32 bit X 16MB X 8B = 128MB
128 MB 16 Mbit x 72 256Mb 16Mb 16 bit 16MB X 8B = 128MB X
256MB 32 Mbit x 72 256Mb 16Mb 16 bit X 32MB X 8B = 256MB
256 MB 32 Mbit x 72 256Mb 32Mb 8 bit 32MB X 8B = 256MB X
512 MB 64 Mbit x 72 256Mb 32Mb 8 bit X 64MB X 8B = 512MB
512 MB 64 Mbit x 72 256Mb 64Mb 4 bit 64MB X 8B = 512MB X
1GB 128 Mbit x 72 256Mb 64Mb 4 bit X 128MB X 8B = 1GB
! NOTE
All memory components and DIMMs used with this motherboard must comply with the following
PC SDRAM specifications:
• PC SDRAM Specification (memory component specific)
• PC SDRAM Registered DIMM Specification
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