Asus M4A785D-M PRO: 1.6 Central Processing Unit (CPU)

ASUS M4A785D-M PRO 1-7

1.6 Central Processing Unit (CPU)

The motherboard comes with an AM2+ / AM2 socket designed for Phenom™ II /

Athlon™ II / Phenom™ / Athlon™/ Sempron™ family processors (AM3 / AM2+ / AM2).

The AM3/AM2/AM2+ socket has a different pinout from the 940-pin socket designed for the

AMD Opteron™ processor. Use a CPU that is designed for the AM3/AM2/AM2+ socket.

1.6.1 Installing the CPU

To install a CPU:

1. Locate the CPU socket on the motherboard.

2. Unlock the socket by pressing the lever

Socket lever

sideways, then lift it up to a 90º angle.

Make sure that the socket lever is lifted up to

a 90º angle; otherwise, the CPU will not t in

completely.

3. Position the CPU above the socket such that

the CPU corner with the gold triangle matches

the socket corner with a small triangle.

4. Carefully insert the CPU into the socket until it

ts in place.

The CPU ts only in one correct

orientation. DO NOT force the

CPU into the socket to prevent

bending the pins and damaging

the CPU.

Gold triangle

Small triangle

1-8 Chapter 1: Product introduction

5. When the CPU is in place, push down the

socket lever to secure the CPU. The lever

clicks on the side tab to indicate that it is

locked.

6. Install a CPU heatsink and fan following

the instructions that came with the heatsink

package.

7. Connect the CPU fan cable to the CPU_FAN connector on the motherboard.

Do not forget to connect the CPU fan connector! Hardware monitoring errors can occur if

you fail to plug this connector.

ASUS M4A785D-M PRO 1-9

1.6.2 Installing the heatsink and fan

Ensure that you use only AMD-certied heatsink and fan assembly.

To install the CPU heatsink and fan:

1. Place the heatsink on top of the installed CPU, making sure that the heatsink ts

properly on the retention module base.

• The retention module base is already installed on the motherboard upon purchase.

• You do not have to remove the retention module base when installing the CPU or

installing other motherboard components.

• If you purchased a separate CPU heatsink and fan assembly, ensure that a Thermal

Interface Material is properly applied to the CPU heatsink or CPU before you install the

heatsink and fan assembly.

CPU Fan

CPU Heatsink

Retention bracket

Retention Module Base

Retention bracket lock

Your boxed CPU heatsink and fan assembly should come with installation instructions for

the CPU, heatsink, and the retention mechanism. If the instructions in this section do not

match the CPU documentation, follow the latter.

2. Attach one end of the retention bracket to the retention module base.