Advantech AIMB-556, User Manual

Page: 29 / 142

15 Chapter 1
1.9 System Memory
The AIMB-556 has four sockets for 240-pin dual inline memory modules
(DIMMs) in two memory channels.
All these sockets use 1.8 V unbuffered double data rate synchronous
DRAMs (DDR SDRAM). They are available in capacities of 256 MB,
512 MB, 1024 MB and 2 GB. The sockets can be filled in any combina-
tion with DIMMs of any size, giving a total memory size between 256
MB and 4 GB.
1.9.1 CPU FSB and memory speed
The AIMB-556 can accept DDR2 SDRAM memory chips without parity.
Also note that the AIMB-556 accepts DDR2 400/533/667 MHz SDRAM,
and DDR2 SDRAM. The AIMB-556 does NOT support ECC (error
checking and correction).
1.10 Memory Installation Procedures
To install DIMMs, first make sure the two handles of the DIMM socket
are in the “open” position. i.e. the handles lean outward. Slowly slide the
DIMM module along the plastic guides on both ends of the socket. Then
press the DIMM module right down into the socket, until you hear a
click. This is when the two handles have automatically locked the mem-
ory module into the correct position of the DIMM socket. To remove the
memory module, just push both handles outward, and the memory mod-
ule will be ejected by the mechanism in the socket.
1.11 Cache Memory
The CPU that AIMB-556 supports built-in 2 MB or 4 MB cache memory.