A computer processor developed by Intel as an upgrade to the 386 processor series and commonly referred to as the 486 or i486. The 80486 has 8k of memory cache built into the processor with 32-bit databus architecture and was available in clock rates ranging from 20MHz to 33MHz. The 486
was available as either a DX or SX, the DX features a built-in coprocessor. the SX does not. In addition to the 486SX, a 486SX2 was also available and was capable of doubling the speed. The picture is an example of the Intel i486 SX processor with the OverDrive socket .