<s>
The	O
Intel	B-Device
i486DX2	I-Device
,	O
rumored	O
as	O
80486DX2	B-Device
(	O
later	O
renamed	O
IntelDX2	O
)	O
is	O
a	O
CPU	B-General_Concept
produced	O
by	O
Intel	O
that	O
was	O
first	O
introduced	O
in	O
1992	O
.	O
</s>
<s>
The	O
i486DX2	B-Device
was	O
nearly	O
identical	O
to	O
the	O
i486DX	B-General_Concept
,	O
but	O
it	O
had	O
additional	O
clock	O
multiplier	O
circuitry	O
.	O
</s>
<s>
An	O
i486	B-General_Concept
DX2	O
was	O
thus	O
significantly	O
faster	O
than	O
an	O
i486	B-General_Concept
DX	O
at	O
the	O
same	O
bus	O
speed	O
thanks	O
to	O
the	O
8K	O
on-chip	B-General_Concept
cache	I-General_Concept
shadowing	O
the	O
slower	O
clocked	O
external	O
bus	O
.	O
</s>
<s>
The	O
i486DX2-66	O
was	O
a	O
very	O
popular	O
processor	O
for	O
video	O
games	O
enthusiasts	O
in	O
the	O
early	O
to	O
mid-90s	O
.	O
</s>
<s>
Often	O
coupled	O
with	O
4	O
to	O
8	O
MB	O
of	O
RAM	O
and	O
a	O
VLB	O
video	O
card	O
,	O
this	O
CPU	B-General_Concept
was	O
capable	O
of	O
playing	O
virtually	O
every	O
game	O
title	O
available	O
for	O
years	O
after	O
its	O
release	O
,	O
right	O
up	O
to	O
the	O
end	O
of	O
the	O
MS-DOS	B-Application
game	O
era	O
,	O
making	O
it	O
a	O
"	O
sweet	O
spot	O
"	O
in	O
terms	O
of	O
CPU	B-General_Concept
performance	O
and	O
longevity	O
.	O
</s>
<s>
The	O
introduction	O
of	O
3D	O
graphics	O
spelled	O
the	O
end	O
of	O
the	O
486	B-General_Concept
's	O
reign	O
,	O
because	O
of	O
their	O
heavy	O
use	O
of	O
floating	B-Algorithm
point	I-Algorithm
calculations	O
and	O
the	O
need	O
for	O
faster	O
cache	B-General_Concept
and	O
more	O
memory	B-General_Concept
bandwidth	I-General_Concept
.	O
</s>
<s>
Developers	O
began	O
to	O
target	O
the	O
P5	B-General_Concept
Pentium	B-Device
processor	I-Device
family	O
almost	O
exclusively	O
with	O
x86	B-Language
assembly	I-Language
language	I-Language
optimizations	O
which	O
led	O
to	O
the	O
usage	O
of	O
terms	O
such	O
as	O
Pentium	B-Device
compatible	O
processor	O
for	O
software	O
requirements	O
.	O
</s>
<s>
An	O
i486DX2-50	O
version	O
was	O
also	O
available	O
,	O
but	O
because	O
the	O
bus	O
speed	O
was	O
25MHz	O
rather	O
than	O
33MHz	O
,	O
this	O
was	O
a	O
significantly	O
less	O
popular	O
processor	O
.	O
</s>
<s>
There	O
are	O
two	O
major	O
versions	O
of	O
the	O
DX2	O
-	O
Identified	O
by	O
P24	O
and	O
P24D	O
,	O
the	O
latter	O
has	O
a	O
faster	O
L1	B-General_Concept
cache	I-General_Concept
mode	O
,	O
called	O
"	O
write-back	O
"	O
,	O
that	O
improves	O
performance	O
.	O
</s>
<s>
The	O
original	O
P24	O
version	O
offered	O
only	O
the	O
slower	O
"	O
write-through	O
"	O
cache	B-General_Concept
mode	O
.	O
</s>
<s>
AMD	B-Device
and	O
Cyrix	O
both	O
produced	O
a	O
competitor	O
for	O
the	O
Intel	B-Device
i486DX2	I-Device
.	O
</s>
