Intel Pentium OverDrive Processor with MMX Technology Installation Manual page 6

After locating the processor, examine the socket to determine the socket
type. Most Pentium processor-based computers use a socket with a handle
that locks and unlocks, called a zero insertion force (ZIF) socket.
Some computers use a socket without a handle, called a low insertion force
(LIF) socket.
Typical LIF socket
(no handle)
• If your computer has either a power cable attached to the Pentium
processor's heat sink or a heat sink attached with a clip, go to step 5.
• If your computer doesn't have a power cable attached to the heat sink
and doesn't have a heat sink attached with a clip, skip step 5 and go to
step 6.
Handle
If the socket in your computer doesn't have a handle,
Intel strongly recommends that you have a qualified
professional install the Pentium OverDrive processor
with MMX technology rather than installing it yourself.
Typical ZIF socket
(with handle)
7