<s>
The	O
Pentium	B-Device
Dual-Core	I-Device
brand	O
was	O
used	O
for	O
mainstream	O
x86-architecture	O
microprocessors	B-Architecture
from	O
Intel	O
from	O
2006	O
to	O
2009	O
,	O
when	O
it	O
was	O
renamed	O
to	O
Pentium	B-General_Concept
.	O
</s>
<s>
The	O
processors	O
are	O
based	O
on	O
either	O
the	O
32-bit	O
Yonah	B-Device
or	O
(	O
with	O
quite	O
different	O
microarchitectures	B-General_Concept
)	O
64-bit	O
Merom-2M	O
,	O
Allendale	O
,	O
and	O
Wolfdale-3M	O
core	B-Device
,	O
targeted	O
at	O
mobile	O
or	O
desktop	B-Device
computers	I-Device
.	O
</s>
<s>
In	O
terms	O
of	O
features	O
,	O
price	O
,	O
and	O
performance	O
at	O
a	O
given	O
clock	O
frequency	O
,	O
Pentium	B-Device
Dual-Core	I-Device
processors	O
were	O
positioned	O
above	O
Celeron	B-Device
but	O
below	O
Core	B-Device
and	O
Core	B-Device
2	I-Device
processors	O
in	O
Intel	O
's	O
product	O
range	O
.	O
</s>
<s>
The	O
Pentium	B-Device
Dual-Core	I-Device
was	O
also	O
a	O
very	O
popular	O
choice	O
for	O
overclocking	B-Application
,	O
as	O
it	O
can	O
deliver	O
high	O
performance	O
(	O
when	O
overclocked	O
)	O
at	O
a	O
low	O
price	O
.	O
</s>
<s>
In	O
2006	O
,	O
Intel	O
announced	O
a	O
plan	O
to	O
return	O
the	O
Pentium	B-General_Concept
trademark	O
from	O
retirement	O
to	O
the	O
market	O
,	O
as	O
a	O
moniker	O
of	O
low-cost	O
Core	B-Device
microarchitecture	I-Device
processors	O
based	O
on	O
the	O
single-core	O
Conroe-L	O
but	O
with	O
1	O
MB	O
of	O
cache	B-General_Concept
.	O
</s>
<s>
The	O
identification	O
numbers	O
for	O
those	O
planned	O
Pentiums	B-General_Concept
were	O
similar	O
to	O
the	O
numbers	O
of	O
the	O
latter	O
Pentium	B-Device
Dual-Core	I-Device
microprocessors	B-Architecture
,	O
but	O
with	O
the	O
first	O
digit	O
"	O
1	O
"	O
instead	O
of	O
"	O
2	O
"	O
,	O
suggesting	O
their	O
single-core	O
function	O
.	O
</s>
<s>
A	O
single-core	O
Conroe-L	O
with	O
1	O
MB	O
cache	B-General_Concept
was	O
deemed	O
as	O
not	O
strong	O
enough	O
to	O
distinguish	O
the	O
planned	O
Pentiums	B-General_Concept
from	O
the	O
Celerons	B-Device
,	O
so	O
it	O
was	O
replaced	O
by	O
dual-core	B-Architecture
central	B-General_Concept
processing	I-General_Concept
units	I-General_Concept
(	O
CPU	O
)	O
,	O
adding	O
"	O
Dual-Core	B-Architecture
"	O
to	O
the	O
line	O
's	O
name	O
.	O
</s>
<s>
Throughout	O
2009	O
,	O
Intel	O
changed	O
the	O
name	O
from	O
Pentium	B-Device
Dual-Core	I-Device
to	O
Pentium	B-General_Concept
in	O
its	O
publications	O
.	O
</s>
<s>
Some	O
processors	O
were	O
sold	O
under	O
both	O
names	O
,	O
but	O
the	O
newer	O
E5400	O
through	O
E6800	O
desktop	B-Device
and	O
SU4100/T4x00	O
mobile	O
processors	O
were	O
not	O
officially	O
part	O
of	O
the	O
Pentium	B-Device
Dual-Core	I-Device
line	O
.	O
</s>
<s>
The	O
first	O
processors	O
using	O
the	O
brand	O
appeared	O
in	O
notebook	B-Device
computers	I-Device
in	O
early	O
2007	O
.	O
</s>
<s>
Those	O
processors	O
,	O
named	O
Pentium	B-General_Concept
T2060	B-Device
,	O
T2080	B-Device
,	O
and	O
T2130	O
,	O
had	O
the	O
32-bit	O
Pentium	B-General_Concept
M-derived	O
Yonah	B-Device
core	B-Device
,	O
and	O
closely	O
resembled	O
the	O
Core	B-Device
Duo	O
T2050	O
processor	O
with	O
the	O
exception	O
of	O
having	O
1	O
MB	O
of	O
L2	O
cache	B-General_Concept
instead	O
of	O
2	O
MB	O
.	O
</s>
<s>
All	O
three	O
of	O
them	O
had	O
a	O
533MHz	O
front-side	B-Architecture
bus	I-Architecture
(	O
FSB	O
)	O
connecting	O
the	O
CPU	O
with	O
the	O
synchronous	O
dynamic	O
random-access	O
memory	O
(	O
SDRAM	O
)	O
.	O
</s>
<s>
Intel	O
developed	O
the	O
Pentium	B-Device
Dual-Core	I-Device
at	O
the	O
request	O
of	O
laptop	B-Device
manufacturers	O
.	O
</s>
<s>
Subsequently	O
,	O
on	O
June	O
3	O
,	O
2007	O
,	O
Intel	O
released	O
the	O
desktop	B-Device
Pentium	B-Device
Dual-Core	I-Device
branded	O
processors	O
known	O
as	O
the	O
Pentium	B-General_Concept
E2140	O
and	O
E2160	O
.	O
</s>
<s>
An	O
E2180	B-Device
model	O
was	O
released	O
later	O
in	O
September	O
2007	O
.	O
</s>
<s>
These	O
processors	O
support	O
the	O
Intel	O
64	O
extensions	O
,	O
being	O
based	O
on	O
the	O
newer	O
,	O
64-bit	O
Allendale	O
core	B-Device
with	O
Core	B-Device
microarchitecture	I-Device
.	O
</s>
<s>
These	O
closely	O
resembled	O
the	O
Core	B-Device
2	I-Device
Duo	I-Device
E4300	O
processor	O
,	O
with	O
the	O
exception	O
of	O
having	O
1	O
MB	O
of	O
L2	O
cache	B-General_Concept
instead	O
of	O
2	O
MB	O
.	O
</s>
<s>
Both	O
of	O
them	O
had	O
an	O
800MHz	O
front-side	B-Architecture
bus	I-Architecture
(	O
FSB	O
)	O
.	O
</s>
<s>
They	O
targeted	O
the	O
budget	O
market	O
above	O
the	O
Intel	B-Device
Celeron	I-Device
(	O
Conroe-L	O
single-core	O
series	O
)	O
processors	O
featuring	O
only	O
512	O
KB	O
of	O
L2	O
cache	B-General_Concept
.	O
</s>
<s>
Such	O
a	O
step	O
marked	O
a	O
change	O
in	O
the	O
Pentium	B-General_Concept
brand	O
,	O
relegating	O
it	O
to	O
the	O
budget	O
segment	O
rather	O
than	O
its	O
former	O
position	O
as	O
a	O
mainstream	O
or	O
premium	O
brand	O
.	O
</s>
<s>
These	O
CPUs	O
are	O
highly	O
overclockable	B-Application
.	O
</s>
<s>
The	O
mobile	O
version	O
of	O
the	O
Allendale	O
processor	O
,	O
the	O
Merom-2M	O
,	O
was	O
also	O
introduced	O
in	O
2007	O
,	O
featuring	O
1MB	O
of	O
L2	O
cache	B-General_Concept
but	O
only	O
533	O
MT/s	O
FSB	O
with	O
the	O
T23xx	O
processors	O
.	O
</s>
<s>
The	O
bus	O
clock	O
was	O
subsequently	O
raised	O
to	O
667	O
MT/s	O
with	O
the	O
T3xxx	O
Pentium	B-General_Concept
processors	O
made	O
from	O
the	O
same	O
dies	O
.	O
</s>
<s>
The	O
45nm	B-Algorithm
E5200	O
model	O
was	O
released	O
by	O
Intel	O
on	O
August	O
31	O
,	O
2008	O
,	O
with	O
a	O
larger	O
2MB	O
L2	O
cache	B-General_Concept
over	O
the	O
65nm	B-Algorithm
E21xx	O
series	O
and	O
the	O
2.5GHz	O
clock	O
speed	O
.	O
</s>
<s>
The	O
E5200	O
model	O
is	O
also	O
a	O
highly	O
overclockable	B-Application
processor	O
,	O
with	O
many	O
reaching	O
over	O
3.75GHz	O
clock	O
speed	O
using	O
just	O
the	O
stock	O
Intel	O
cooler	O
.	O
</s>
<s>
Intel	O
released	O
the	O
E6500K	O
model	O
using	O
this	O
core	B-Device
.	O
</s>
<s>
The	O
Penryn	B-Device
core	B-Device
is	O
the	O
successor	O
to	O
the	O
Merom	B-Device
core	B-Device
and	O
Intel	O
's	O
45nm	B-Algorithm
version	O
of	O
their	O
mobile	O
series	O
of	O
Pentium	B-Device
Dual-Core	I-Device
processors	O
.	O
</s>
<s>
Intel	O
released	O
the	O
first	O
Penryn-based	O
Pentium	B-Device
Dual-Core	I-Device
,	O
the	O
T4200	O
,	O
in	O
December	O
2008	O
.	O
</s>
<s>
Later	O
,	O
mobile	B-Architecture
Pentium	I-Architecture
T4000	O
,	O
SU2000	O
,	O
and	O
SU4000	O
processors	O
based	O
on	O
Penryn	B-Device
were	O
marketed	O
as	O
Pentium	B-General_Concept
.	O
</s>
<s>
The	O
Pentium	B-Device
Dual-Core	I-Device
brand	O
was	O
discontinued	O
in	O
early	O
2010	O
and	O
replaced	O
by	O
the	O
Pentium	B-General_Concept
name	O
.	O
</s>
<s>
The	O
Desktop	B-Device
E6000	O
series	O
and	O
the	O
OEM-only	O
mobile	B-Architecture
Pentium	I-Architecture
SU2000	O
,	O
and	O
all	O
later	O
models	O
were	O
always	O
called	O
Pentium	B-General_Concept
,	O
but	O
the	O
Desktop	B-Device
Pentium	B-Device
Dual-Core	I-Device
E2000	O
and	O
E5000	O
series	O
processors	O
had	O
to	O
be	O
rebranded	O
.	O
</s>
<s>
Although	O
using	O
the	O
Pentium	B-General_Concept
name	O
,	O
the	O
desktop	B-Device
Pentium	B-Device
Dual-Core	I-Device
is	O
based	O
on	O
the	O
Core	B-Device
microarchitecture	I-Device
,	O
which	O
can	O
be	O
seen	O
when	O
comparing	O
the	O
specification	O
to	O
the	O
Pentium	B-Device
D	I-Device
,	O
which	O
is	O
based	O
on	O
the	O
NetBurst	B-Device
microarchitecture	B-General_Concept
first	O
introduced	O
in	O
the	O
Pentium	B-General_Concept
4	O
.	O
</s>
<s>
Below	O
the	O
2	O
or	O
4	O
MB	O
of	O
shared-L2-cache-enabled	O
Core	B-Device
2	I-Device
Duo	I-Device
,	O
the	O
desktop	B-Device
Pentium	B-Device
Dual-Core	I-Device
has	O
1	O
or	O
2	O
MB	O
of	O
shared	O
L2	O
Cache	B-General_Concept
.	O
</s>
<s>
In	O
contrast	O
,	O
the	O
Pentium	B-Device
D	I-Device
processors	O
have	O
either	O
2	O
or	O
4	O
MB	O
of	O
non-shared	O
L2	O
cache	B-General_Concept
.	O
</s>
<s>
Additionally	O
,	O
the	O
fastest-clocked	O
Pentium	B-Device
D	I-Device
has	O
a	O
factory	O
boundary	O
of	O
3.73GHz	O
,	O
while	O
the	O
fastest-clocked	O
desktop	B-Device
Pentium	B-Device
Dual-Core	I-Device
reaches	O
3.2GHz	O
.	O
</s>
<s>
A	O
significant	O
difference	O
among	O
these	O
processors	O
is	O
that	O
the	O
desktop	B-Device
Pentium	B-Device
Dual-Core	I-Device
processors	O
have	O
a	O
TDP	B-General_Concept
of	O
only	O
65	O
W	O
while	O
the	O
Pentium	B-Device
D	I-Device
ranges	O
between	O
95	O
and	O
130	O
W	O
.	O
Pentium	B-Device
dual-core	I-Device
outperformed	O
Pentium	B-Device
D	I-Device
by	O
a	O
reasonably	O
large	O
margin	O
despite	O
the	O
reduced	O
clock	O
speed	O
and	O
lower	O
amounts	O
of	O
cache	B-General_Concept
.	O
</s>
