System Memory; Table 1.7:Dimm Mem Capacity Sample Calculations; Supplementary Information About Dimms; Memory Installation Procedures - Advantech PCA-6184 User Manual

1.8 System Memory

The PCA-6184 contains two sockets for 184-pin dual memory modules
(DIMMs). All these sockets accept only 2.5 V DDR200/DDR266
SDRAM. DIMMs are available in capacities of 64,128, 256, 512 MB and
1 GB. The sockets can be filled in any combination with DIMMs of any
size, giving your PCA-6184 single board computer up to 2 GB of mem-
ory.
Table 1.7: DIMM mem capacity sample calculations
Socket number
1
2

1.8.1 Supplementary information about DIMMs

Your PCA-6184 can accept only DDR memory modules with or without
parity. Also note:
• Chips with 9 chips/side support ECC; chips with 8 chips/side do not
support ECC.

1.9 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.

1.10 Cache Memory

Since the second level (L2) cache has been embedded into the Pentium®
4/Celeron® processor, you do not have to take care of either SRAM chips
or SRAM modules. The built-in second level cache in the Pentium® 4
processor yields much higher performance than the external cache memo-
ries. The cache size in the Pentium® 4 processor is 256/512 KB, depend-
ing on the type of CPU. The cache size in Celeron® processor is 128KB.
184-pin DIMM memory
64, 128, 256 or 512 MB or 1 GB
64, 128, 256 or 512 MB or 1 GB
13