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i486DX-20 - Intel
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Intel i486DX-20
General Info
DesignerIntel
ManufacturerIntel
Model Numberi486DX-20
Part NumberA80486DX-20
IntroductionApril 10, 1989 (announced)
June, 1989 (launched)
General Specs
Family80486
Series486DX
Frequency20 MHz
Bus typeFSB
Bus speed20 MHz
Bus rate20 MT/s
Clock multiplier1
Microarchitecture
Microarchitecture80486
Core Name486DX
Process1 µm, 800 nm
Transistors1,200,000
TechnologyCMOS
Word Size32 bit
Cores1
Max CPUs1 (Uniprocessor)
Max Memory4 GiB
Electrical
Vcore5 V
OP Temperature0 °C – 85 °C

i486DX-20 was a fourth-generation x86 microprocessor introduced by Intel in 1989. This chip, which is based on the 80486 microarchitecture, operated at 20 MHz. This chip implemented the 80387 FPU on-die and incorporated System Management Mode (SMM).

Cache[edit]

Main article: 80486 § Cache
Cache Info [Edit Values]
L1$ 8 KiB
0.00781 MiB
8,192 B
7.629395e-6 GiB
1x8 KiB 4-way set associative (unified, write-through policy)

Graphics[edit]

This chip had no integrated graphics processing unit.

Features[edit]

See also[edit]

Facts about "i486DX-20 - Intel"
base frequency20 MHz (0.02 GHz, 20,000 kHz) +
bus rate20 MT/s (0.02 GT/s, 20,000 kT/s) +
bus speed20 MHz (0.02 GHz, 20,000 kHz) +
bus typeFSB +
clock multiplier1 +
core count1 +
core name486DX +
core voltage5 V (50 dV, 500 cV, 5,000 mV) +
designerIntel +
family80486 +
first announcedApril 10, 1989 +
first launchedJune 1989 +
full page nameintel/80486/486dx-20 +
instance ofmicroprocessor +
l1$ description4-way set associative +
l1$ size0.00781 MiB (8 KiB, 8,192 B, 7.629395e-6 GiB) +
ldateJune 1989 +
manufacturerIntel +
max cpu count1 +
max memory4,096 MiB (4,194,304 KiB, 4,294,967,296 B, 4 GiB, 0.00391 TiB) +
max operating temperature85 °C +
microarchitecture80486 +
min operating temperature0 °C +
model numberi486DX-20 +
nameIntel i486DX-20 +
part numberA80486DX-20 +
process1,000 nm (1 μm, 0.001 mm) + and 800 nm (0.8 μm, 8.0e-4 mm) +
series486DX +
technologyCMOS +
transistor count1,200,000 +
word size32 bit (4 octets, 8 nibbles) +