# Intel 80486SX

> 32-bit microprocessor model released in 1991

**Wikidata**: [Q2635535](https://www.wikidata.org/wiki/Q2635535)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/I486SX)  
**Source**: https://4ort.xyz/entity/intel-80486sx

## Summary  
The Intel 80486SX is a 32-bit microprocessor released in 1991. It was part of Intel's 80486 series and served as a lower-cost variant of the 80486DX, primarily targeting budget personal computers.

## Key Facts  
- Released in September 1991  
- Developed by Intel  
- Part of the Intel 80486 series  
- Classified as a 32-bit microprocessor  
- Variant of the 80486DX without a built-in math coprocessor  
- Instance of product model and subclass of microprocessor  
- Aliases include 486SX, 80486sx, Intel ٨٠٤٨٦SX, انتل ٨٠٤٨٦SX, Intel 80486SX  
- Wikipedia title: I486SX  
- Supported languages: Arabic, Azerbaijani, German, English, French, Norwegian, Portuguese, Russian  

## FAQs  
### Q: What is the Intel 80486SX?  
A: The Intel 80486SX is a 32-bit microprocessor introduced in 1991. It was designed as a cost-reduced version of the 80486DX, lacking an integrated floating-point unit (FPU).

### Q: How does the 80486SX differ from the 80486DX?  
A: The 80486SX lacks a built-in math coprocessor (FPU), which is present in the 80486DX. This made the SX model less expensive but also slower at performing complex mathematical calculations unless paired with an external coprocessor.

### Q: When was the Intel 80486SX released?  
A: The Intel 80486SX was announced in September 1991.

## Why It Matters  
The Intel 80486SX played a significant role in making 32-bit computing more accessible during the early 1990s. By offering a reduced-feature version of the popular 80486DX, Intel enabled manufacturers to produce more affordable PCs without sacrificing core processing capabilities for general use. While it lacked a built-in FPU, the 80486SX still delivered solid performance for everyday tasks such as word processing, basic multimedia, and operating system functions. Its release reflected Intel’s strategy to address diverse market segments through tiered product offerings, influencing PC pricing and adoption trends throughout that era.

## Notable For  
- Being a cost-reduced variant of the 80486DX  
- Lacking an integrated floating-point unit (math coprocessor)  
- Targeting budget-conscious personal computer markets  
- Supporting mainstream applications despite reduced features  
- Representing Intel’s approach to market segmentation in the 486 generation  

## Body  
### Overview  
The Intel 80486SX is a member of the Intel 80486 family of processors. Introduced in September 1991, it was positioned as a lower-cost alternative to the full-featured 80486DX. Designed for systems where high-end computational power wasn't required, the 80486SX helped expand access to 32-bit computing in consumer and business PCs.

### Technical Characteristics  
- Architecture: 32-bit x86  
- Series: Intel 80486  
- Coprocessor: No integrated FPU (floating-point unit)  
- Clock Speeds: Available in various speeds including 16 MHz, 20 MHz, and 25 MHz models  
- Manufacturing Process: 1 micron  
- Package Type: PGA (Pin Grid Array)

### Market Positioning  
The 80486SX was marketed toward original equipment manufacturers (OEMs) building budget-friendly desktop computers. Because it omitted the math coprocessor found in the 80486DX, it carried a significantly lower price tag while retaining compatibility with most software optimized for the 80486 platform.

### Legacy  
Although eventually superseded by newer architectures like the Pentium series, the 80486SX contributed to the democratization of personal computing in the early 1990s. Its design influenced how semiconductor companies approached feature differentiation and pricing strategies across generations of CPUs.

## References

1. Freebase Data Dumps. 2013
2. [Source](https://www.intel.com/pressroom/kits/quickreffam.htm#i486)