_______________________________________________________________
Pentium Pentium
Processor Processor
60Mhz 66Mhz
Address Bus 32 Bit 32 Bit
Data Bus 64 Bit 64 Bit
FPU Present Yes Yes
Memory
Management Yes Yes
Cache on Chip Two 8k Caches Two 8k Caches
Frequency (MHz) 60MHz 66MHz
Avg. Cycle/Inst. 0.5 0.5
iComp Index 510 567
Dhrystone MIPS v1.1 100 111.6
Frequency of FPU =CPU =CPU
Frequency =CPU =CPU
Upgradable Yes Yes
Address Range 4 Gigabytes 4 GByte
Frequency Scalability No No
# of Transistors 3.21 Million 3.21 Million
Voltage 5v 5v
System Management Yes Yes
Date of Introduction Mar-93 Mar-93
* On average, it takes 1.95 cycles to complete one instruction, OR,
the i487SX finishes one instruction 633% faster than the 8088.
* The FPU is the Floating Point Unit.
Intel Corporation makes no warranty for the use of its products and
assumes no responsibility for any errors which may appear in this
document nor does it make a commitment to update the information
contained herein.
I486DX2-40, - 50, & -66
Processor i486DX2-40 i486DX2-50 i486DX2-66
Address Bus 32 Bit 32 Bit 32 Bit
Data Bus 32 Bit 32 Bit 32 Bit
FPU Present Yes Yes Yes
Memory Management Yes Yes Yes
Cache on Chip 8K 8K 8K
Frequency (MHz) 40 MHz 50 MHz 66MHz
Avg. Cycles/Inst 1.03 1.03 1.03
iComp Index 182 231 297
Dhrystone MIPS v1.1 21.1 40.5 54.5
Frequency of FPU =CPU =CPU =CPU
Frequency =CPU =CPU =CPU
Upgradable Yes Yes Yes
Address Range 4 Gigabytes 4 Gigabytes 4 Gigabytes
Freq. Scalability No No No
# of Transistors 1.2 Million 1.2 Million 1.2 Million
Voltage 5v and 3v 5v and 3v 5v
System Mang. Mode Yes Yes Yes
Date of Introduction Jun-93 May-92 Aug-92
* Intel486(TM) DX2 OverDrive(TM) Processor
The performance and features of Intel DX2 OverDrive Processors is
identicle to that of Intel486 DX2 Microprocessor, operating at the
same frequency.
* In the i486DX2, and DX2 OverDrive, the reference is to the internal
clock which runs at 2X the external clock.
* Intel has produced a version of the Intel486 SL Microprocessor which
does not contain a floating point unit. These CPUs are being sold
only to IBM for it's IBM PS/Note 425SL, and IBM Thinkpad 350 & 350C
notebooks. These systems are not upgradeable to the Intel487 SX
Math Coprocessor, or the Intel OverDrive Processor.
* On average, it takes 1.95 cycles to complete one instruction, OR,
the i487SX finishes one instruction 633% faster than the 8088.
* The FPU is the Floating Point Unit.
Intel Corporation makes no warranty for the use of its products and
assumes no responsibility for any errors which may appear in this
document nor does it make a commitment to update the information
contained herein.
Intel486 SX and Intel486 DX Processors
Processor i486SX i486DX i486DX-50
Address Bus 32 Bit 32 Bit 32 Bit
Data Bus 32 Bit 32 Bit 32 Bit
FPU Present N/A Yes Yes
Memory Management Yes Yes Yes
Cache on Chip 8K 8K 8K
Frequency (MHz) "16,20,25,33"25,33" 50 MHz
Avg. Cycles/Inst. 1.03 1.03 1.03
iComp Index 136 @33MHz 166 @ 33MHz 249
Dhrystone MIPS v1.1 20.2 @ 25MHz26.9 @ 33MHz 41.4
Frequency of FPU N/A =CPU =CPU
Frequency =CPU =CPU =CPU
Upgradable Yes Yes NO
Address Range 4 Gigabytes 4 Gigabytes 4 Gigabytes
Freq. Scalability NO NO NO
# of Transistors 1.2 Million 1.2 Million 1.2 Million
Voltage 5v and 3v 5v and 3v 5v
System Mang. Mode NO NO NO
Date of Introduction Sep-91 Apr-89 Jun-91
* Standard i486SX and standard i486DX microprocessors are not frequency
scaleable. A version of these microprocessors called Low Power
Version was produced in limited quantity and is frequency
scaleable.
* On average, it takes 1.95 cycles to complete one instruction, OR,
the i487SX finishes one instruction 633% faster than the 8088.
* The FPU is the Floating Point Unit.
Intel Corporation makes no warranty for the use of its products and
assumes no responsibility for any errors which may appear in this
document nor does it make a commitment to update the information
contained herein.
Intel386 Processor Family
i386SX i386DX i386SL
Address Bus 24 Bit 32 Bit 24 Bit
Data Bus 16 Bit 32 Bit 16 Bit
FPU Present N/A N/A N/A
Memory Management Yes Yes Yes
Cache on chip No No Control
Frequency (MHz) "16,20,25,33" "16,20,25,33""16,20,25"
Avg. Cycles/Inst. 4.9 4.9 <4.9
iComp Index 56 @33MHz 68 @ 33MHz 41 @25MHz
Dhrystone MIPS v1.1 3.6 @20MHz 11.4 @ 33MHz 4.5 @ 25MHz
Frequency of FPU =CPU =CPU =CPU
Frequency 2X CPU 2X CPU "2,4,8XCPU"
Upgradable No No No
Address Range 16 Megabytes 4 Gigabytes 16 Megabytes
Freq. Scalability No No No
# of Transistors 275,000 275,000 855,000
Voltage 5v 5v 3v or 5v
System Mang. Mode No No Yes
Date of IntroductionJun-88 Oct-85 Oct-90
* On average, it takes 1.95 cycles to complete one instruction, OR,
the i487SX finishes one instruction 633% faster than the 8088.
* The FPU is the Floating Point Unit.
Intel Corporation makes no warranty for the use of its products and
assumes no responsibility for any errors which may appear in this
document nor does it make a commitment to update the information
contained herein.
Intel 8086, 8088 and 80286 Processors
8086 8088 80286
Address Bus 16 Bit 16 Bit 24 Bit
Data Bus 16 Bit 8 Bit 16 Bit
FPU Present NO NO NO
Memory Management NO NO NO
Cache on chip NO NO NO
Frequency (MHz) 5,8,10 5,8,10 6,8,10,12
Avg. Cycles/Inst. 12 12 4.9
Frequency of FPU =CPU =CPU 2/3 CPU
Frequency 3X 3X 2X
Upgradable NO NO NO
Address Range 1 Megabyte 1 Megabyte 16 Megabytes
Freq. Scalibility NO NO NO
Voltage 5v 5v 5v
Date of Introduction Jun-78 Jun-79 Feb-82
* On average, it takes 1.95 cycles to complete one instruction, OR,
the i487SX finishes one instruction 633% faster than the 8088.
* The FPU is the Floating Point Unit.
Intel Corporation makes no warranty for the use of its products and
assumes no responsibility for any errors which may appear in this
document nor does it make a commitment to update the information
contained herein.