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Intel A80486DX2-66

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Intel 66 MHz specifications

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General information
TypeCPU / Microprocessor
FamilyIntel 80486
CPU part number
  • A80486DX2-66 is an OEM/tray microprocessor
Frequency  ? 66 MHz
Bus speed  ? 33 MHz
Clock multiplier  ? 2
Package168-pin Pin Grid Array
1.75" x 1.75" (4.45 cm x 4.45 cm)
SocketPGA168
Introduction date10-Aug-92
Upgrade options
S-spec numbers
Part number ES/QS processors Production processors
  Q0423 Q0567 Q0609 Q0618 Q0652 SK058 SK080 SX645
A80486DX2-66++++++++
 
Part number Production processors
  SX725 SX731 SX739 SX744 SX750 SX759 SX762 SX807
A80486DX2-66++++++++
 
Part number Production processors
  SX911 SX955 SYE36
A80486DX2-66+++
Architecture / Microarchitecture
Microarchitecturei486
CPUIDs433 (SX645, SX750, SX759, SX762)
435 (SX807, SX911)
436 (SX955)
Manufacturing process0.8 micron
1.2 million transistors
Data width32 bit
Floating Point UnitIntegrated
Level 1 cache size  ? 8 KB 4-way set associative unified code and data cache
Physical memory4 GB
Virtual memory64 TB
Low power features
  • Stop Clock state (SL enhanced version only) (SL enhanced version only)
  • Stop Grant state (SL enhanced version only) (SL enhanced version only)  ? 
  • Stop Clock Snoop state (SL enhanced version only) (SL enhanced version only)
  • Auto Halt state (SL enhanced version only) (SL enhanced version only)
  • Auto Idle Power Down mode (SL enhanced version only) (SL enhanced version only)
  • Upgrade Power Down mode (SL enhanced version only) (SL enhanced version only)
On-chip peripheralsMemory management unit
Electrical / Thermal parameters
V core  ? 5V ± 5%
Minimum/Maximum operating temperature  ? 0°C - 85°C
Minimum/Typical/Maximum power dissipationN/A / 4.88 Watt / 6.3 Watt
0.45 Watt (Stop Grant mode) / 4.5 Watt / 6.3 Watt (SL technology)
Notes on Intel 66 MHz
  • Newer versions of the processor incorporate SL technology.

Detailed side-by-side comparison

If you want to compare in detail the Intel 66 MHz with any other processor from our CPU database please select desired processor using one of the following methods:

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    You can specify any of the following: manufacturer name, family name, model number, part number, core name, microarchitecture, manufacturing process, socket name, operating frequency, bus speed, the number of cores and threads, cache size, TDP and GPU type. Here are some examples of searches: A80486DX2-66, Intel 80486 66MHz, PGA168, i486 1 core 1 thread, 0.8 micron noGPU

ICOMP index comparison

An easy way to compare performance of the Intel A80486DX2-66 processor with other 80386, 80486 and Pentium CPUs is to use an Intel Comparative Microprocessor Performance index, or iCOMP. That index represents a weighted score, derived from several 16-bit and 32-bit benchmarks. The score is scaled relative to the performance of the 80486SX-25 microprocessor, which is assumed to have an iCOMP index of 100. Faster processors have higher iCOMP scores. The A80486DX2-66 microprocessor has an iCOMP index of 297.
Model / Part number   Result
Intel Pentium 66MHz A80501-66
190.9%
Intel Pentium 66MHz PCPU5V66
190.9%
Intel Pentium 60MHz A80501-60
171.7%
Intel Pentium 60MHz PCPU5V60
171.7%
Intel 100MHz A80486DX4-100
146.5%
Intel 75MHz A80486DX4-75
107.4%
Intel 66MHz A80486DX2-66
100%
Intel 66MHz A80486DX2-66 (WriteBack)
100%
Intel 50MHz A80486DX-50
83.8%
Intel 50MHz A80486DX2-50
77.8%
Intel 50MHz A80486DX2-50 (WriteBack)
77.8%
Intel 50MHz A80486SX2-50
60.6%
Intel 33MHz A80486DX-33
55.9%
Intel 33MHz A80486SX-33
45.8%
Intel 25MHz A80486DX-25
41.1%
Intel 25MHz A80486SX-25
33.7%
Intel 25MHz A80486SX-25 (LowPower)
33.7%
Intel 20MHz A80486SX-20
26.3%
Intel 20MHz A80486SX-20 (LowPower)
26.3%
Intel 33MHz A80386DX-33
22.9%
Intel 33MHz A80386DX-33 IV
22.9%

CPUs, related to Intel A80486DX2-66 (66 MHz)

Model Frequency L1
cache		 Features  
Intel 80486 family, i486 micro-architecture, Other sockets
   FA80486SX33 (33 MHz)33 MHz8 KB>

Pictures (15)

Without heatsink

66 MHz
168-pin ceramic PGA		 Intel A80486DX2-66
With heatsink

66 MHz
168-pin ceramic PGA		 Intel A80486DX2-66
Fake / top view

66 MHz
168-pin ceramic PGA
Top view

Fake processor		 Intel A80486DX2-66
Fake / bottom view

66 MHz
168-pin ceramic PGA
Bottom view

Fake processor		 Intel A80486DX2-66
486DX2-66 03H4939 PQ
2007-05-26 07:48:08
Posted by: Worfvx

MFG BY IBM 		486DX2-66 03H4939 PQ
Intel 80486DX2-66 w/ heatsink
2007-10-10 02:20:26
Posted by: PEter Jozsa

Intel 80486DX2-66 with original blue anodized heatsink. 		Intel 80486DX2-66 w/ heatsink
SX731
2009-06-10 11:37:24
Posted by: iCoee

  		SX731
 
2009-07-14 23:31:42
Posted by: dege13

  		 
 
2009-11-22 00:23:44
Posted by: Dragonwing

  		 
Intel A80486DX2-66
2010-05-13 13:30:33
Posted by: Dmitry

  		Intel A80486DX2-66
 
2010-06-02 15:14:07
Posted by: fuynfactory

  		 
 
2013-03-21 13:12:13
Posted by: FISH93S

Custom heatsink 		 
samples
2015-03-12 06:32:51
Posted by: John

  		samples
 
2015-06-08 00:56:20
Posted by: Compgeke

  		 
My old 486 DX2
2020-12-20 12:19:00
Posted by: Julian H.G.

Good times 		My old 486 DX2
Comments (2)

You're welcome to post suggestions, corrections, your own personal Intel 66 MHz review, or your experience with the microprocessor. Please do not ask upgrade and troubleshooting questions, and do not start discussions.

First computer had this CPU.

2010-10-16 22:49:04
Posted by: Bill

This was my very first CPU when I was about 14 years old...

Good preformer (in it's day)

2012-01-01 09:15:18
Posted by: Joe Sixpack

Back in the day these was a excellent 486, Wasn't much you couldn't do with one.

They seem to be one of the most common 486 CPU.

I remember my old Compaq Prolinea 466.
Man that was a awesome machine.
Remember late nights with my friends playing warcraft 2 via null serial cable.

Had 72pin memory, a compact yet easy to work on case, and PCI slots! woot!

DX2 66 and 32mb of ram it ran win95 pretty good.
Sadly it stopped recognizing the hdd and I junked it.. I had already moved on to Pentium by then.. Now I wonder if it wasn't the HDD going bad.. I was younger and stupid, now im older and stupid but still I regret trashing it now.

If I ever find another pronlina Im gonna fix it up as a 486 shrine, The idea of upgrading it with the PCI slots make me giggle too.. anyone for some usb2.0? or maybe upgrade it with SATA-1.5 oh that's a warm thought :)

Last modified: 24 Jun 2021
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