486SX

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486SX

486SX

A slower version of the 486 without the math coprocessor. 486SXs could be upgraded to 486DX2s with Intel's OverDrive chip, which included the coprocessor. The DX2 chip was plugged into the empty coprocessor socket, disabling the original CPU. See 486.
References in periodicals archive ?
The same goes for the 80486DX as opposed to an 80486SX machine.
The specifications further require a minimum 80486SX processor running at a clock speed of 25 megahertz (MHz).
Microcomputer Prices Fourth Second Microchip and Speed Quarter 1993 Quarter 1994 80386SX, 33 megahertz 890 810 80486SX, 33 megahertz 1,550 1,460 80486DX2, 50 megahertz 2,050 1,820 80486DX2, 66 megahertz 2,380 2,040 Pentium, 60 megahertz 5,130 4,530 Pentium, 66 megahertz 6,120 5,250 Source: Computerworld, Nov.
manufactures and markets, direct to end users, ISA and EISA (Industry Standard and Extended Industry Standard Architecture) personal computer systems and work stations based on the Intel 80386SL, 80486SX, SX, DX and DX2 microprocessors worldwide.
Now they are trying to make the 80486 and 80486SX the new desktop standard by killing off the 80386.
Using that model, we determined that in 1995 our users' $2000 will buy a laptop computer with: an Intel 80486SX running at 33MHz, 16MB of RAM, a 400MB hard disk, and a 640-by-480 VGA display with 16 levels of gray.