Acer Altos R710 - Manual (Page 89)

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Upgrading the CPU
This section includes instructions for removing and installing a CPU.
Important! Always observe the ESD precautions when installing or
removing a system component. Refer to page 34.
Installing a CPU
1 Insert the CPU into the mainboard socket, making sure the
indicator on the processor is aligned with the indicator on the
socket(A). Lower the CPU locking lever to secure the processor (B).