Asus M3N78 SE - Manual (Page 20)

1-10 Chapter 1: Product introduction
3. Align the other end of the retention bracket (near the retention bracket lock) to the
retention module base. A clicking sound denotes that the retention bracket is in place.
Ensure that the fan and heatsink assembly perfectly fits the retention mechanism module
base. Otherwise, you cannot snap the retention bracket in place.
4. Push down the retention bracket lock on the retention mechanism to secure the
heatsink and fan to the module base.
5. Connect the CPU fan cable to the connector on the motherboard labeled CPU_FAN.
1.7 System memory
1.7.1 Overview
The motherboard comes with two Double Data Rate 2 (DDR2) Dual Inline Memory Modules
(DIMM) sockets. A DDR2 module has the same physical dimensions as a DDR DIMM but
has a 240-pin footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are notched
differently to prevent installation on a DDR DIMM socket. The figure illustrates the location of
the DDR2 DIMM sockets:
Channel Sockets
Channel 1 DIMM_A1
Channel 2 DIMM_B1
M3N78 SE
M3N78 SE 240-pin DDR2 DIMM sockets
DIMM_A
1
DIMM_B
1