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The 321-pin ZIF socket consists of five rows of pin holes on each side.
To prevent improper CPU installation, the ZIF socket has a Plug/Keying
mechanism. Several holes in the socket are plugged so that the CPU
will go in only one way. If you cannot easily insert the CPU, verify that
pin 1 of the CPU is aligned with pin 1 of the socket.
Warning:
Be extremely careful to match pin 1 of the CPU with pin 1 of the socket.
Only Intel's OverDrive processor is keyed to prevent improper place-
ment in the ZIF socket. Other Intel CPUs, as well as CPUs from other
vendors, can be placed incorrectly and will be permanently damaged if
incorrectly placed. Usually pin 1 of the CPU is marked by a dot or a cut
corner.
Zero Insetion Force (ZIF) Socket
24
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