Base 1

Base 1
As an adapter base
Specifications
design type	PGA - LIF / ZIF
contacts	169
Bus cycle	16, 20, 25, 33 MHz
Operating voltage	5 V
Processors	Intel i486 SX (16–33 MHz) Intel i486SX2 (50–66 MHz) Intel i486DX (20–33 MHz) Intel i486DX2 (50–66 MHz) and compatibles

The base 1 is a processor socket for the Intel i486 processors. It was originally intended as a socket for "Overdrive" processors from Intel , but has developed into the standard socket for i486 motherboards . Only a few i486 "Overdrive" processors were developed by Intel, the Pentium Overdrive required a newer socket, at least the successor socket 2 .

The socket is backwards compatible with the previous socket 486 which had 168 contacts.