ASRock PE PRO-HT [9/25] Installation of cpu fan and heatsink

168-pin RAM

184-pin RAM

The CPU fits only in one correct orientation. DO NOT force the

CPU into the socket to avoid bending of the pins.

Step 4. When the CPU is in place, press it firmly on the socket while you push down

the socket lever to secure the CPU. The lever clicks on the side tab to

indicate that it is locked.

Step 1 Step 2, 3 Step 4

2.4 Installation of CPU Fan and Heatsink

Intel

Pentium

4 CPU requires larger heatsink and cooling fan. Thermal

grease between the CPU and the heatsink is also needed to improve heat

transfer. Make sure that the CPU and the heatsink are securely fastened and

in good contact with each other. For proper installation, please kindly

refer to the instruction manuals of vendors of CPU fan and heatsink.

2.5 Installation of Memory Modules (DIMM)

SDRAM (Synchronous DRAM) DIMM (Dual In-line Memory Module) has 168 pins

and DDR (Double Data Rate) SDRAM DIMM has 184 pins.

Please make sure to disconnect power supply before adding or

removing DIMMs or the system components.

The 168-pin SDRAM DIMM slot (black) and 184-pin DDR DIMM slot (blue) can be easily

distinguished by the fool-proof design.

Please do not use both 168-pin SDRAM DIMM and 184-pin DDR DIMM

at the same time. To optimize the compatibility, it is not recommended

to use two different models of the DIMMs at the same time.