DFI 486-OCV Plus User Manual page 30

Pentium OverDrive Ready System Board
TM
Install the 80486SX, 80486DX, 80486DX2 or the 80486
TM
OverDrive
pins, in the three inner rows of the socket. The
outermost row of pin holes should be visible on all four
sides of the socket when any of these CPUs is installed.
The Pentium
pins on each side and should be installed so it covers all
the pin holes of the ZIF socket.
To install, simply move the handle upward. Remove the
original CPU from the socket. If the board has an
486SX CPU soldered on at U26, you should leave it
intact.
Position the upgrade CPU above the socket. Make sure
pin 1 of the CPU is aligned with pin 1 of the socket.
Lower the chip until the pins are inserted properly in
their corresponding holes.
Pin 1
2-23 u Installation Overview
Processor, which only has three rows of
TM
OverDrive Processor has four rows of
Pin 1 of the ZIF Socket