IBM CI5VGM Series - Manual (Page 15)

Chapter 2 Installations
CI5VGM User’s Manual 11
CPU Installation
The CI5VGM Industrial CPU Card supports a ZIF processor socket for
Pentium-level processors.
Unlike PGA sockets, ZIF (Zero Insertion Force) sockets come with a
lever to secure the processor. Make sure the notch on the corner of the
CPU corresponds with the notch on the inside of the socket.
After you have installed the processor into the ZIF socket, check if the
jumpers for the CPU type and speed are correct.
NOTE: Ensure that the CPU heat sink and the CPU top surface are in
total contact to avoid CPU overheating problem that would
cause your system to hang or be unstable.