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The presence detect serial EEPROM specified in the JEDEC standard is required and must be set properly. Details about the required values for each byte on presence detect EEPROM can be found in sections 4.5.4 and 4.1.2.5 of the JEDEC standard 21-C, release 7 specification.
The RAM DIMM connector accommodates 3.3 volt unbuffered 168-pin SDRAM DIMM cards as defined in the JEDEC specification.
Signals A[0-13] on each SDRAM DIMM make up a 14-bit multiplexed address bus that can support several different types of DRAM devices. Table 4-2 shows the address multiplexing modes used with SDRAM types of DRAM devices. The devices are characterized by their bit dimensions: for example, a 1 M by 16-bit device has 1 M addresses and stores 16 bits at a time.