<s>
The	O
K6	B-Architecture
microprocessor	B-Architecture
was	O
launched	O
by	O
AMD	O
in	O
1997	O
.	O
</s>
<s>
The	O
main	O
advantage	O
of	O
this	O
particular	O
microprocessor	B-Architecture
is	O
that	O
it	O
was	O
designed	O
to	O
fit	O
into	O
existing	O
desktop	O
designs	O
for	O
Pentium-branded	O
CPUs	B-General_Concept
.	O
</s>
<s>
It	O
was	O
marketed	O
as	O
a	O
product	O
that	O
could	O
perform	O
as	O
well	O
as	O
its	O
Intel	B-General_Concept
Pentium	I-General_Concept
II	I-General_Concept
equivalent	O
but	O
at	O
a	O
significantly	O
lower	O
price	O
.	O
</s>
<s>
The	O
K6	B-Architecture
had	O
a	O
considerable	O
impact	O
on	O
the	O
PC	O
market	O
and	O
presented	O
Intel	O
with	O
serious	O
competition	O
.	O
</s>
<s>
The	O
AMD	B-Architecture
K6	I-Architecture
is	O
a	O
superscalar	B-General_Concept
P5	B-General_Concept
Pentium-class	O
microprocessor	B-Architecture
,	O
manufactured	O
by	O
AMD	O
,	O
which	O
superseded	O
the	O
K5	O
.	O
</s>
<s>
The	O
AMD	B-Architecture
K6	I-Architecture
is	O
based	O
on	O
the	O
Nx686	B-Architecture
microprocessor	B-Architecture
that	O
NexGen	O
was	O
designing	O
when	O
it	O
was	O
acquired	O
by	O
AMD	O
.	O
</s>
<s>
The	O
K6	B-Architecture
processor	O
included	O
a	O
feedback	O
dynamic	O
instruction	O
reordering	O
mechanism	O
,	O
MMX	B-Architecture
instructions	O
,	O
and	O
a	O
floating-point	B-Algorithm
unit	O
(	O
FPU	O
)	O
.	O
</s>
<s>
It	O
was	O
also	O
made	O
pin-compatible	O
with	O
Intel	O
's	O
Pentium	B-Device
,	O
enabling	O
it	O
to	O
be	O
used	O
in	O
the	O
widely	O
available	O
"	O
Socket	B-General_Concept
7	I-General_Concept
"	O
-based	O
motherboards	O
.	O
</s>
<s>
Like	O
the	O
AMD	O
K5	O
,	O
Nx586	O
,	O
and	O
Nx686	B-Architecture
before	O
it	O
,	O
the	O
K6	B-Architecture
translated	O
x86	B-Operating_System
instructions	O
on	O
the	O
fly	O
into	O
dynamic	O
buffered	O
sequences	O
of	O
micro-operations	B-General_Concept
.	O
</s>
<s>
A	O
later	O
variation	O
of	O
the	O
K6	B-Architecture
CPU	O
,	O
K6-2	O
,	O
added	O
floating-point-based	O
SIMD	O
instructions	O
,	O
called	O
3DNow	B-General_Concept
!	I-General_Concept
.	O
</s>
<s>
The	O
K6	B-Architecture
was	O
originally	O
launched	O
in	O
April	O
1997	O
,	O
running	O
at	O
speeds	O
of	O
166	O
and	O
200MHz	O
.	O
</s>
<s>
Initially	O
,	O
the	O
AMD	B-Architecture
K6	I-Architecture
processors	O
used	O
a	O
Pentium	O
II-based	O
performance	O
rating	O
(	O
PR2	O
)	O
to	O
designate	O
their	O
speed	O
.	O
</s>
<s>
The	O
lower	O
voltage	O
and	O
higher	O
multiplier	O
of	O
the	O
K6-266	O
meant	O
that	O
it	O
was	O
not	O
fully	O
compatible	O
with	O
some	O
Socket	B-General_Concept
7	I-General_Concept
motherboards	O
,	O
similar	O
to	O
the	O
later	O
K6-2	O
processors	O
.	O
</s>
<s>
The	O
final	O
iteration	O
of	O
the	O
K6	B-Architecture
design	O
was	O
released	O
in	O
May	O
1998	O
,	O
running	O
at	O
300MHz	O
.	O
</s>
