ECS P4IBAS2 Manual page 24

This mainboard has a Socket 423 processor socket. When
choosing a processor, consider the performance requirements
of the system. Performance is based on the processor design,
the clock speed and system bus frequency of the processor,
and the quantity of internal cache memory and external cache
memory.
CPU Installation Procedure
The following illustration shows CPU installation components:
Follow these instructions to install the CPU:
1. Pull the CPU socket locking lever away from the
socket to unhook it and raise the locking lever to the
upright position.
2. Identify the pin-1 corner on the CPU socket and the
pin-1 corner on the processor.
3. Match the pin-1 corners and insert the processor into
the socket. Do not use force.
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