User manual

AIMB-554 User Manual 14
1.9 System Memory
The AIMB-554 has two sockets for 240-pin memory modules (DIMMs).
All these sockets use 1.8 V unbuffered double data rate synchronous
DRAMs (DDR SDRAM). They are available in capacities of 256, 512
and 1024 MB. The sockets can be filled in any combination with DIMMs
of any size, giving a total memory size between 256 MB and 2GB.
1.9.1 CPU FSB and memory speed
The AIMB-554 can accept DDR2 SDRAM memory chips without parity.
Also note: The AIMB-554 accepts DDR2 400/533/667MHz SDRAM,
and DDR2 SDRAM. The AIMB-554 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-554 supports built-in 2MB or 4MB cache memory.