Fujitsu D1561, D1562 technical manual Upgrading main memory, Memory clock pulse speed

Upgrading main memory

Upgrading main memory

Technical data

Technology:	DDR 266, DDR 333 or DDR 400 unbuffered DIMM modules
	184-Pin; 2.5 V; 64 Bit, no ECC
Size:	128 Mbytes up to 4 Gbyte DDR 266 SDRAM
	128 Mbytes up to Gbyte DDR 333 SDRAM
	128 Mbytes up to Gbyte DDR 400 SDRAM
Granularity:	128, 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/mainboards.

At least one memory module must be installed. Memory modules with different memory capacities can be combined.

You may only use unbuffered 2,5 V memory modules. Buffered memory modules are not ! supported. DDR-DIMM memory modules must meet the PC2100, PC2700 or PC3200

specification.

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 available when identical memory modules (same order number, same manufacturer, same size, memory density) are used in a memory slot 1 and 2 or memory slot 3 and 4.

slot 4
	Channel B	slot 2
slot 3
	Channel A	slot 1

		Number of inserted memory modules
slot to be used	1		2	3	4
Channel A, slot 1	X		X	X	X
Channel A, slot 3				X	X
Channel B, slot 2			X	X	X
Channel B, slot 4					X

If you use more than one memory module, then make sure to distribute the memory modules over both memory channels (see table). By doing this you use the performance advantages of the dual- channel mode.

Memory clock pulse speed

The memory clock pulse speed is affected by the chipset and processor system bus (PSB). The table shows the memory speed in dependence on the Processor System Bus.

System bus (MHz)	DDR400 (MHz)	DDR333 (MHz)	DDR266 (MHz)
800	400	320	266

20 - English A26361-D1562-Z120-2-6319