mITX-BW – User Guide, Rev. 1.6
www.kontron.com
// 20
3.4.
System Memory Support
The mITX-BW has two DDR3L SO-DIMM sockets. The sockets support the following memory features:
2x DDR3L 1.35 V SO-DIMM 204-pin
Dual-channel with 1 SO-DIMM per channel
From 1 GByte and up to 2x 4 GByte.
Single/dual rank unbuffered 1333/1600MT/s (PC3-10600/PC3-12800)
SPD timings supported
ECC not supported
If only one SO-DIMM is used, then slot J24 must be used as the primary slot (ChannelA).
If Slot J25 (Channel B) is populated, then the board will not boot.
If using 32bit OS then less than 4GB in displayed in System (Shared Video Memory/PCI
resources is subtracted). Use SO-DIMM with the same memory density in both sockets!
The installed DDR3L SO-DIMM should support the Serial Presence Detect (SPD) data structure. This allows the BIOS to
read and configure the memory controller for optimal performance. If non-SPD memory is used, the BIOS will attempt
to configure the memory settings, but performance and reliability may be impacted.
Memory Operating Frequencies
Regardless of the SO-DIMM type used, the memory frequency will either be equal to or less than the processor
system bus frequency. For example, if DDR3L 1600 memory is used with a 1333 MHz system bus frequency processor,
the memory clock will operate at 167 MHz. The table below lists the resulting operating memory frequencies based on
the combination of SO-DIMMs and processor.
Table 4: Memory Operating Frequencies
SO-DIMM Type Module Name
Memory Data
Transfers
(MT/s)
Processor System
Bus Frequency
(MHz)
Resulting Memory
Clock Frequency
(MHz)
Peak Transfer
Rate
(MB/s)
DDR3L 1333
PC3-10600
1333
1333
167
10666
DDR3L 1600
PC3-12800
1600
1600
200
12800
Kontron offers the following memory modules:
2 GByte DDR3L 1600 PC3-12800, P/N: 1060-2520
4 GByte DDR3L 1600 PC3-12800, P/N: 1060-2522
8 GByte DDR3L 1600 PC3-12800, P/N: 1060-2524
Memory modules have in general a much lower longevity than embedded motherboards, and therefor EOL of
modules can be expected several times during lifetime of the motherboard. Kontron guarantees that the above P/N
will be maintained so that EOL module will be replaced by other similar type of qualified module.
As a minimum it is recommend using Kontron memory modules for prototype system(s) in order to prove stability of
the system and as for reference.
For volume production you might request to test and qualify other types of RAM. In order to qualify RAM it is
recommend configuring 3 systems running RAM Stress Test program in heat chamber at 60° C for a minimum of 24
hours.
