The Intel486™ Processor Reference Information

This information is provided for reference only. Not all of the products listed here are currently available through Intel.
For more technical information, please refer to the Embedded Intel Architecture section for developers.

Processor: IntelDX4™ Processor IntelDX2™ Processor IntelSX2™ Processor Intel486™ DX Processor Intel486 SX Processor

Internal
Bus Width: up to 128 bits up to 128 bits up to 128 bits up to 128 bits up to 128 bits

External
Bus Width: 32 bits 32 bits 32 bits 32 bits 32 bits

Virtual
Address
Space: 64 Terabytes 64 Terabytes 64 Terabytes 64 Terabytes 64 Terabytes

Physical
Address
Space: 4 GB 4 GB 4 GB 4 GB 4 GB

Clock
Frequency: 75 MHz, 100MHz 50 MHz, 66MHz 50MHz 25MHz, 33MHz,
50MHz 16MHz, 20MHz,
25MHz, 33MHz

iCOMP®
Rating*: 319, 435 231, 297 180 122, 166,
249 63, 78
100, 136

Math Co-
processor
Support: Built-in Built-in OverDrive®
Processor Built-in None

First
Level Cache
Controller: 16 KB Cache
Built-in 8 KB Cache
Built-in 8 KB Cache
Built-in 8 KB Cache
Built-in 8 KB Cache
Built-in

Voltage: 3.3 V 5 V or 3.3 V 5 Vor 3.3 V 5 V or 3.3 V 5 V or 3.3 V

Manufacturing
Process: 0.6 micron 0.6 micron 0.6 micron 1 micron,
0.8 micron,
0.6 micron 0.8 micron,
0.6 micron


Processor:	IntelDX4™ Processor	IntelDX2™ Processor	IntelSX2™ Processor	Intel486™ DX Processor	Intel486 SX Processor
Internal Bus Width:	up to 128 bits	up to 128 bits	up to 128 bits	up to 128 bits	up to 128 bits
External Bus Width:	32 bits	32 bits	32 bits	32 bits	32 bits
Virtual Address Space:	64 Terabytes	64 Terabytes	64 Terabytes	64 Terabytes	64 Terabytes
Physical Address Space:	4 GB	4 GB	4 GB	4 GB	4 GB
Clock Frequency:	75 MHz, 100MHz	50 MHz, 66MHz	50MHz	25MHz, 33MHz, 50MHz	16MHz, 20MHz, 25MHz, 33MHz
iCOMP® Rating*:	319, 435	231, 297	180	122, 166, 249	63, 78 100, 136
Math Co- processor Support:	Built-in	Built-in	OverDrive® Processor	Built-in	None
First Level Cache Controller:	16 KB Cache Built-in	8 KB Cache Built-in	8 KB Cache Built-in	8 KB Cache Built-in	8 KB Cache Built-in
Voltage:	3.3 V	5 V or 3.3 V	5 Vor 3.3 V	5 V or 3.3 V	5 V or 3.3 V
Manufacturing Process:	0.6 micron	0.6 micron	0.6 micron	1 micron, 0.8 micron, 0.6 micron	0.8 micron, 0.6 micron

Performance Indicators

iCOMP(R) Index for Intel486(TM) Processor Family

iCOMP Index stands for the Intel COmparative Microprocessor Performance Index. The iCOMP Index is a weighted average of several industry-standard benchmarks. Each component measures a specific aspect of processor performance, including 16- and 32-bit integer, floating-point, video and graphics capabilities.

*Note: The iCOMP ratings shown have not been updated to the more recent iCOMP Index 2.0 because 486 processors are not measured under the new index. iCOMP Index 2.0 reflects current and emerging 32-bit software and multimedia applications that are designed to take advantage of Pentium, Pentium Pro and future Intel processors. iCOMP Index 2.0 numbers cannot be compared to the original iCOMP Index numbers because different benchmarks and scalings are used.

SPECint92 and SPECfp92 for Mature Intel Processors

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