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Mainboard User’s Manual 

 

3.  Identify the pin-1 corner of the mPGA478.    The pin-1 corner is 

on the same side as the locking lever, as shown in the 
illustration below. 

4.  Identify the pin-1 corner of the processor (the pin-1 corner on 

the processor has a beveled edge). 

5.  Align the pin-1 corners and drop the processor into the 

mPGA478.  The processor should drop into place without any 
force.    If it doesn’t seat properly, check that you have the pin-1 
corner in the correct position. 

 

6.  Swing the locking lever down to lock the processor in place and 

latch the lever under the catch on the side of the socket. 

7.  Plug the cable from the heat sink/cooling fan assembly into the 

processor cooling fan power supply CPU FAN. 

8.  Configuration of the processor is carried out using the system 

setup utility as described in Chapter 4. Configure the processor 
the first time you turn on the assembled computer. 

 

First, remove the motherboard from the chassis. To remove the 
processor from the motherboard, follow these steps: 

1.  Disconnect the fan power cable from the motherboard. 
2.  Push the CPU socket lever slightly to the side and then raise 

it as far as it can go. You will feel a resistance as the 
processor is freed from the socket. 

3.  Remove the processor.

 Installing the CPU 

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