Fujitsu Siemens Computers D1944, Technical Manual

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Add-on modules / Upgrading
A26361-D1944-Z120-1-7419, edition 1 English - 15
Upgrading main memory
Technical data
Technology: DDR-1 400 unbuffered DIMM modules
184-Pin; 1.8 V; 64 Bit, no ECC
Size: 256 Mbytes to 4 Gbytes DDR-1
Granularity: 256, 512 or 1024 Mbyte for one socket
● A current list of the memory modules recommended for this mainboard is available on the
Internet at:
www.fujitsu-siemens.com .
At least one memory module must be installed. Memory modules with different memory capacities
can be combined.
!
You may only use unbuffered 1.8 V memory modules. Buffered memory modules are not
supported.
DDR-1 memory modules must meet the PC3200 specification.
i
The mainboard has two memory channels (channel A and channel B) with two slots each
(slot 1 and 3 or slot 2 and 4).
The maximum system performance is achieved when identical memory modules are used
per channel.
Channel A
Channel B
slot 2
slot 1
slot 4
slot 3
If you use more than one memory module, then make sure to distribute the memory modules over
both memory channels. By doing this you use the performance advantages of the dual-channel
mode.