Editing intel/80486/486dx2-66

{{intel title|i486DX2-66}}
{{chip
| name                = Intel i486DX2-66
| image               = Intel 80486DX2 top.jpg
| image size          = 
| caption             = A80486DX2-66, S-Spec SX645
| designer            = Intel
| manufacturer        = Intel
| model number        = i486DX2-66
| part number         = A80486DX2-66
| part number 2       = A80486DX2SA66
| part number 3       = MA80486DX2-66
| part number 4       = A80P24-66 
| part number 5       = MQ80486DX2-66
| part number 6       = TQ80486DX266
| market              = 
| first announced     = 
| first launched      = March 3, 1992
| last order          = 
| last shipment       = 

| family              = 80486
| series              = 486DX2
| locked              = 
| frequency           = 66 MHz
| bus type            = FSB
| bus speed           = 33 MHz
| bus rate            = 33 MT/s
| clock multiplier    = 2
| s-spec              = SK058
| s-spec 2            = SK080
| s-spec 3            = SX645
| s-spec 4            = SX725
| s-spec 5            = SX731
| s-spec 6            = SX739
| s-spec 7            = SX744
| s-spec 8            = SX750
| s-spec 9            = SX759
| s-spec 10           = SX762
| s-spec 11           = SX807
| s-spec 12           = SX911
| s-spec 13           = SX955
| s-spec 14           = SYE36
| s-spec es           = 
| s-spec qs           = Q0609
| s-spec qs 2         = Q0618
| s-spec qs 3         = Q0652
| cpuid               = 433
| cpuid 2             = 435
| cpuid 3             = 436

| microarch           = 80486
| platform            = 
| chipset             = 
| core name           = 486DX2
| core family         = 
| core model          = 
| core stepping       = 
| process             = 1 µm
| process 2           = 800 nm
| transistors         = 
| technology          = CMOS
| die size            = 
| word size           = 32 bit
| core count          = 1
| max cpus            = 1
| max memory          = 4 GiB


| power               = 4.88 W
| v core              = 5 V
| v core tolerance    = 5%
| temp max            = 85 °C
| temp min            = 0 °C

| packaging           = Yes
| package             = CPGA-168
| package type        = 
| package size        = CPGA
| package 2           = PQFP-196
| package type 2      = PQFP
| package 3           = SQFP-208
| package type 3      = SQFP
| socket              = Socket 1 
| socket 2            = Socket 2
| socket 3            = Socket 3
}}
'''i486DX2-66''' was a fourth-generation [[x86]] [[microprocessor]] introduced by [[Intel]] in 1992. This chip, which is based on the {{intel|microarchitectures/80486|80486 microarchitecture}}, had a clock doubler operating at 66 MHz, twice the bus frequency. Like the original i486DX, this chip implemented the {{intel|80387}} [[FPU]] on-die and incorporated {{intel|System Management Mode}} (SMM).

== Cache ==
{{main|intel/microarchitectures/80486#Memory_Hierarchy|l1=80486 § Cache}}
{{cache info
|l1 cache=8 KiB
|l1 break=1x8 KiB
|l1 desc=4-way set associative
|l1 extra=(unified, write-through policy)
}}

== Graphics ==
This chip had no integrated graphics processing unit.

== Features ==
* {{intel|System Management Mode}} (SMM)

== Gallery ==
<gallery>
File:Intel i486 DX2 66 CPU SX750.jpg|A80486DX2-66, S-Spec SX750
File:Intel i486 DX2 66 CPU SX955.jpg|A80486DX2-66, S-Spec SX955
File:Intel i486 DX2 66 MHz CPU SX955.jpg|A80486DX2-66, S-Spec SX955
File:Intel i486 dx2 66mhz 2007 03 27.jpg|A80486DX2-66, S-Spec SX955
File:Intel i486 Dx2.JPG|A80486DX2-66, S-Spec SX911
File:Intel i486 DX2.JPG|A80486DX2-66, S-Spec SX911
</gallery>

== See also ==
* {{intel|80486|80486 family}}
base frequency	66 MHz (0.066 GHz, 66,000 kHz) +
bus rate	33 MT/s (0.033 GT/s, 33,000 kT/s) +
bus speed	33 MHz (0.033 GHz, 33,000 kHz) +
bus type	FSB +
clock multiplier	2 +
core count	1 +
core name	486DX2 +
core voltage	5 V (50 dV, 500 cV, 5,000 mV) +
core voltage tolerance	5% +
cpuid	433 +, 435 + and 436 +
designer	Intel +
family	80486 +
first launched	March 3, 1992 +
full page name	intel/80486/486dx2-66 +
instance of	microprocessor +
l1$ description	4-way set associative +
l1$ size	8 KiB (8,192 B, 0.00781 MiB) +
ldate	March 3, 1992 +
main image	+
main image caption	A80486DX2-66, S-Spec SX645 +
manufacturer	Intel +
max cpu count	1 +
max memory	4,096 MiB (4,194,304 KiB, 4,294,967,296 B, 4 GiB, 0.00391 TiB) +
max operating temperature	85 °C +
microarchitecture	80486 +
min operating temperature	0 °C +
model number	i486DX2-66 +
name	Intel i486DX2-66 +
part number	A80486DX2-66 +, A80486DX2SA66 +, MA80486DX2-66 +, A80P24-66 +, MQ80486DX2-66 + and TQ80486DX266 +
power dissipation	4.88 W (4,880 mW, 0.00654 hp, 0.00488 kW) +
process	1,000 nm (1 μm, 0.001 mm) + and 800 nm (0.8 μm, 8.0e-4 mm) +
s-spec	SK058 +, SK080 +, SX645 +, SX725 +, SX731 +, SX739 +, SX744 +, SX750 +, SX759 +, SX762 +, SX807 +, SX911 +, SX955 + and SYE36 +
s-spec (qs)	Q0609 +, Q0618 + and Q0652 +
series	486DX2 +
smp max ways	1 +
technology	CMOS +
word size	32 bit (4 octets, 8 nibbles) +