Foxconn 865M01-G-6ELS - Manual (Page 24)

Chapter 2 Installation Instructions
16
865M01G/PE/GV User Manual
Memory
This motherboard includes two 184-pin slots with 2.6V Double Data Rate (DDR)
Dual Inline Memory Module (DIMM) sockets, so you can install PC3200/2700/
2100 memory. You must install at least one memory bank to ensure normal
operation.
DIMM1
DIMM2
DDR Memory
The DDR SDRAM technology evolved from the mainstream PC66, PC100,
PC133 memory known as Single Data Rate (SDR) SDRAM. DDR memory,
however, has the ability to perform two data operations in one clock cycle,
thus providing twice the throughput of SDR memory.
A DDR DIMM has the same physical dimensions as an SDR DIMM, but it
has a 184-pin footprint compared to the 168-pin of the SDR DIMM. Also, a
DDR DIMM is single notched while an SDR DIMM is double notched.
Therefore, a DDR DIMM is not backward compatible with SDR, and should
be installed only in a socket specially designed for DDR DIMMs.