<s>
Pentium	B-Device
D	I-Device
is	O
a	O
range	O
of	O
desktop	O
64-bit	O
x86-64	O
processors	O
based	O
on	O
the	O
NetBurst	B-Device
microarchitecture	O
,	O
which	O
is	O
the	O
dual-core	B-Architecture
variant	O
of	O
the	O
Pentium	B-General_Concept
4	I-General_Concept
manufactured	O
by	O
Intel	O
.	O
</s>
<s>
Each	O
CPU	B-Device
comprised	O
two	O
dies	O
,	O
each	O
containing	O
a	O
single	O
core	O
,	O
residing	O
next	O
to	O
each	O
other	O
on	O
a	O
multi-chip	B-Algorithm
module	I-Algorithm
package	O
.	O
</s>
<s>
The	O
brand	O
's	O
first	O
processor	O
,	O
codenamed	O
Smithfield	B-Device
and	O
manufactured	O
on	O
the	O
90	O
nm	O
process	O
,	O
was	O
released	O
on	O
May	O
25	O
,	O
2005	O
,	O
followed	O
by	O
the	O
65	B-Algorithm
nm	I-Algorithm
Presler	B-Device
nine	O
months	O
later	O
.	O
</s>
<s>
By	O
2004	O
,	O
the	O
NetBurst	B-Device
processors	O
reached	O
a	O
clock	O
speed	O
barrier	O
at	O
3.8GHz	O
due	O
to	O
a	O
thermal	O
(	O
and	O
power	O
)	O
limit	O
exemplified	O
by	O
the	O
Presler	B-Device
's	O
130	O
watt	O
thermal	B-General_Concept
design	I-General_Concept
power	I-General_Concept
(	O
a	O
higher	O
TDP	B-General_Concept
requires	O
additional	O
cooling	O
that	O
can	O
be	O
prohibitively	O
noisy	O
or	O
expensive	O
)	O
.	O
</s>
<s>
The	O
future	O
belonged	O
to	O
more	O
energy	O
efficient	O
and	O
slower	O
clocked	O
dual-core	B-Architecture
CPUs	B-Device
on	O
a	O
single	O
die	O
instead	O
of	O
two	O
.	O
</s>
<s>
However	O
,	O
the	O
Pentium	B-Device
D	I-Device
did	O
not	O
offer	O
significant	O
upgrades	O
in	O
design	O
,	O
still	O
resulting	O
in	O
relatively	O
high	O
power	O
consumption	O
.	O
</s>
<s>
The	O
final	O
shipment	O
date	O
of	O
the	O
dual	O
die	O
Presler	B-Device
chips	O
was	O
August	O
8	O
,	O
2008	O
,	O
which	O
marked	O
the	O
end	O
of	O
the	O
Pentium	B-Device
D	I-Device
brand	O
and	O
also	O
the	O
NetBurst	B-Device
microarchitecture	O
.	O
</s>
<s>
The	O
Pentium	B-Device
D	I-Device
line	O
was	O
removed	O
from	O
the	O
official	O
price	O
lists	O
on	O
July	O
13	O
,	O
2010	O
.	O
</s>
<s>
The	O
dual-core	B-Architecture
CPU	B-Device
is	O
capable	O
of	O
running	O
multi-threaded	B-Operating_System
applications	O
typical	O
in	O
transcoding	B-Algorithm
of	O
audio	O
and	O
video	O
,	O
compressing	B-General_Concept
,	O
photo	O
and	O
video	O
editing	O
and	O
rendering	O
,	O
and	O
ray-tracing	B-Algorithm
.	O
</s>
<s>
Single-threaded	B-Operating_System
applications	O
,	O
including	O
most	O
older	O
games	O
,	O
do	O
not	O
benefit	O
much	O
from	O
a	O
second	O
core	O
compared	O
to	O
an	O
equally	O
clocked	O
single-core	O
CPU	B-Device
.	O
</s>
<s>
Nevertheless	O
,	O
the	O
dual-core	B-Architecture
CPU	B-Device
is	O
useful	O
to	O
run	O
both	O
the	O
client	O
and	O
server	B-Application
processes	O
of	O
a	O
game	O
without	O
noticeable	O
lag	O
in	O
either	O
thread	B-Operating_System
,	O
as	O
each	O
instance	O
could	O
be	O
running	O
on	O
a	O
different	O
core	O
.	O
</s>
<s>
Furthermore	O
,	O
multi-threaded	B-Operating_System
games	O
benefit	O
from	O
dual-core	B-Architecture
CPUs	B-Device
.	O
</s>
<s>
They	O
ran	O
at	O
similar	O
speed	O
when	O
not	O
multitasking	B-Operating_System
on	O
the	O
Pentium	B-Device
D	I-Device
or	O
older	O
Pentium	B-General_Concept
4	I-General_Concept
branded	O
CPUs	B-Device
at	O
the	O
same	O
clock	O
speed	O
.	O
</s>
<s>
However	O
,	O
in	O
multitasking	B-Operating_System
environments	O
such	O
as	O
BSD	B-Operating_System
,	O
Linux	B-Application
,	O
Microsoft	B-Application
Windows	I-Application
operating	I-Application
systems	I-Application
,	O
other	O
processes	O
are	O
often	O
running	O
at	O
the	O
same	O
time	O
;	O
if	O
they	O
require	O
significant	O
CPU	B-Device
time	O
,	O
each	O
core	O
of	O
the	O
Pentium	B-Device
D	I-Device
branded	O
processor	O
can	O
handle	O
different	O
programs	O
,	O
improving	O
overall	O
processing	O
speed	O
over	O
its	O
single-core	O
Pentium	B-General_Concept
4	I-General_Concept
counterpart	O
.	O
</s>
<s>
In	O
April	O
2005	O
,	O
Intel	O
's	O
biggest	O
rival	O
,	O
AMD	O
,	O
had	O
x86	O
dual-core	B-Architecture
processors	I-Architecture
intended	O
for	O
workstations	B-Device
and	O
servers	O
on	O
the	O
market	O
,	O
and	O
was	O
poised	O
to	O
launch	O
a	O
comparable	O
product	O
intended	O
for	O
desktop	B-Device
computers	I-Device
.	O
</s>
<s>
As	O
a	O
response	O
,	O
Intel	O
developed	O
Smithfield	B-Device
,	O
the	O
first	O
x86	O
dual-core	B-Architecture
processor	I-Architecture
intended	O
for	O
desktop	B-Device
computers	I-Device
,	O
beating	O
AMD	O
's	O
Athlon	O
64	O
X2	O
by	O
a	O
few	O
weeks	O
.	O
</s>
<s>
Intel	O
first	O
launched	O
Smithfield	B-Device
on	O
April	O
16	O
,	O
2005	O
in	O
the	O
form	O
of	O
the	O
3.2	O
GHz	O
Hyper-threading	B-Operating_System
enabled	O
Pentium	B-Device
Extreme	I-Device
Edition	I-Device
840	O
.	O
</s>
<s>
On	O
May	O
26	O
,	O
2005	O
,	O
Intel	O
launched	O
the	O
mainstream	O
Pentium	B-Device
D	I-Device
branded	O
processor	O
lineup	O
with	O
initial	O
clock	O
speeds	O
of	O
2.8	O
,	O
3.0	O
,	O
and	O
3.2GHz	O
with	O
model	O
numbers	O
of	O
820	O
,	O
830	O
,	O
and	O
840	O
respectively	O
.	O
</s>
<s>
In	O
March	O
2006	O
,	O
Intel	O
launched	O
the	O
last	O
Smithfield	B-Device
processor	O
,	O
the	O
entry-level	O
Pentium	B-Device
D	I-Device
805	O
,	O
clocked	O
at	O
2.66GHz	O
with	O
a	O
533	O
MT/s	O
bus	O
.	O
</s>
<s>
The	O
relatively	O
cheap	O
805	O
was	O
found	O
to	O
be	O
highly	O
overclockable	B-Application
;	O
3.5GHz	O
was	O
often	O
possible	O
with	O
good	O
air	O
cooling	O
.	O
</s>
<s>
Running	O
it	O
at	O
over	O
4GHz	O
was	O
possible	O
with	O
water	O
cooling	O
,	O
and	O
at	O
this	O
speed	O
the	O
805	O
outperformed	O
the	O
top-of-the-line	O
processors	O
(	O
May	O
2006	O
)	O
from	O
both	O
major	O
CPU	B-Device
manufacturers	O
(	O
the	O
AMD	O
Athlon	O
64	O
FX-60	O
and	O
Intel	O
Pentium	B-Device
Extreme	I-Device
Edition	I-Device
965	O
)	O
in	O
many	O
benchmarks	O
including	O
power	O
consumption	O
.	O
</s>
<s>
The	O
805	O
and	O
820	O
models	O
had	O
a	O
95	O
watt	O
TDP	B-General_Concept
.	O
</s>
<s>
All	O
Smithfield	B-Device
processors	O
were	O
made	O
of	O
two	O
90	O
nm	O
Prescott	O
cores	O
,	O
next	O
to	O
each	O
other	O
on	O
a	O
single	O
die	O
with	O
1	O
MB	O
of	O
Level	O
2	O
(	O
L2	O
)	O
cache	O
per	O
core	O
.	O
</s>
<s>
Hyper-threading	B-Operating_System
was	O
disabled	O
in	O
all	O
Pentium	B-Device
D	I-Device
8xx-series	O
Smithfields	B-Device
with	O
the	O
exception	O
of	O
the	O
Pentium	B-Device
Extreme	I-Device
Edition	I-Device
840	O
.	O
</s>
<s>
Smithfield	B-Device
did	O
not	O
support	O
Intel	O
VT-x	O
—	O
Intel	O
's	O
x86	B-General_Concept
virtualization	I-General_Concept
(	O
formerly	O
Vanderpool	O
)	O
.	O
</s>
<s>
All	O
Pentium	B-Device
D	I-Device
processors	O
supported	O
Intel	O
64	O
(	O
formerly	O
EM64T	B-Device
)	O
,	O
XD	B-General_Concept
Bit	I-General_Concept
,	O
and	O
were	O
manufactured	O
for	O
the	O
LGA	B-Device
775	I-Device
form	O
factor	O
.	O
</s>
<s>
The	O
only	O
motherboards	B-Device
guaranteed	O
to	O
work	O
with	O
the	O
Pentium	B-Device
D	I-Device
(	O
and	O
Extreme	B-Device
Edition	I-Device
)	O
branded	O
CPUs	B-Device
were	O
those	O
based	O
on	O
the	O
945-	O
,	O
955-	O
,	O
965	O
-	O
and	O
975-series	O
Intel	B-Device
chipsets	I-Device
,	O
as	O
well	O
as	O
the	O
nForce	B-Device
4	I-Device
SLI	I-Device
Intel	I-Device
Edition	I-Device
and	O
ATI	O
Radeon	B-Device
Xpress	I-Device
.	O
</s>
<s>
The	O
Pentium	B-Device
D	I-Device
820	O
did	O
not	O
work	O
with	O
the	O
nForce	B-Device
4	I-Device
SLI	I-Device
Intel	I-Device
Edition	I-Device
chipset	O
due	O
to	O
some	O
power	O
design	O
issues	O
,	O
though	O
they	O
were	O
rectified	O
in	O
the	O
X16	O
version	O
.	O
</s>
<s>
The	O
915	O
-	O
and	O
925-series	O
chipsets	O
did	O
not	O
work	O
at	O
all	O
with	O
the	O
Smithfields	B-Device
,	O
as	O
they	O
did	O
not	O
support	O
more	O
than	O
one	O
core	O
(	O
to	O
prevent	O
manufacturers	O
making	O
a	O
cheap	O
dual	B-Architecture
CPU	I-Architecture
motherboard	B-Device
capable	O
of	O
supporting	O
Xeon	B-Device
CPU	B-Device
's	O
,	O
as	O
had	O
happened	O
with	O
the	O
875P	O
chipset	O
)	O
.	O
</s>
<s>
Motherboards	B-Device
with	O
them	O
might	O
be	O
Pentium	B-Device
D	I-Device
compatible	O
with	O
an	O
updated	O
BIOS	B-Operating_System
.	O
</s>
<s>
A	O
week	O
after	O
its	O
launch	O
,	O
Intel	O
officially	O
denied	O
a	O
report	O
in	O
Computerworld	O
Today	O
Australia	O
that	O
the	O
Pentium	B-Device
D	I-Device
branded	O
CPUs	B-Device
included	O
"	O
secret	O
"	O
digital	O
rights	O
management	O
features	O
in	O
their	O
hardware	O
that	O
could	O
be	O
utilized	O
by	O
Microsoft	B-Application
Windows	I-Application
and	O
other	O
operating	B-General_Concept
systems	I-General_Concept
,	O
but	O
was	O
not	O
publicly	O
disclosed	O
.	O
</s>
<s>
The	O
Pentium	B-Device
Extreme	I-Device
Edition	I-Device
(	O
PXE	O
)	O
was	O
introduced	O
at	O
the	O
Spring	O
2005	O
Intel	O
Developers	O
Forum	O
,	O
not	O
to	O
be	O
confused	O
with	O
the	O
"	O
Pentium	B-General_Concept
4	I-General_Concept
Extreme	I-General_Concept
Edition	I-General_Concept
"	O
(	O
an	O
earlier	O
,	O
single-core	O
processor	O
occupying	O
the	O
same	O
niche	O
)	O
.	O
</s>
<s>
The	O
processor	O
was	O
based	O
on	O
the	O
dual-core	B-Architecture
Pentium	B-Device
D	I-Device
branded	O
Smithfield	B-Device
,	O
but	O
with	O
Hyper-threading	B-Operating_System
enabled	O
,	O
thus	O
any	O
operating	B-General_Concept
system	I-General_Concept
saw	O
four	O
logical	O
processors	O
.	O
</s>
<s>
It	O
also	O
had	O
an	O
unlocked	O
multiplier	O
to	O
allow	O
for	O
easier	O
overclocking	B-Application
.	O
</s>
<s>
It	O
was	O
initially	O
released	O
as	O
Intel	O
Pentium	B-Device
Extreme	I-Device
Edition	I-Device
840	O
at	O
3.20GHz	O
,	O
in	O
early	O
2005	O
,	O
at	O
a	O
price	O
point	O
of	O
$999.99	O
(	O
OEM	O
price	O
)	O
or	O
$	O
1,200	O
(	O
retail	O
)	O
.	O
</s>
<s>
The	O
only	O
chipsets	O
that	O
worked	O
with	O
the	O
Extreme	B-Device
Edition	I-Device
840	O
were	O
Intel	O
's	O
955X	O
,	O
NVIDIA	O
's	O
nForce4	B-Device
SLI	O
Intel	O
Edition	O
,	O
and	O
ATi	B-Device
Radeon	I-Device
Xpress	I-Device
200	I-Device
.	O
</s>
<s>
Using	O
a	O
Pentium	B-Device
Extreme	I-Device
Edition	I-Device
branded	O
CPU	B-Device
with	O
an	O
Intel	O
945-series	O
chipset	O
will	O
disable	O
Hyper-threading	B-Operating_System
.	O
</s>
<s>
The	O
last	O
generation	O
of	O
Pentium	B-Device
D	I-Device
branded	O
processors	O
was	O
Presler	B-Device
released	O
on	O
January	O
16	O
,	O
2006	O
,	O
identified	O
by	O
the	O
product	O
code	O
80553	O
,	O
and	O
made	O
of	O
two	O
65	O
nm-process	O
cores	O
found	O
also	O
in	O
Pentium	B-General_Concept
4	I-General_Concept
branded	O
Cedar	O
Mill	O
CPUs	B-Device
.	O
</s>
<s>
Presler	B-Device
introduced	O
the	O
'	O
multi-chip	B-Algorithm
module	I-Algorithm
,	O
or	O
MCM	O
,	O
which	O
consisted	O
of	O
two	O
single-core	O
dies	O
placed	O
next	O
to	O
each	O
other	O
on	O
the	O
same	O
substrate	O
package	O
.	O
</s>
<s>
Presler	B-Device
was	O
supported	O
by	O
the	O
same	O
chipsets	O
as	O
Smithfield	B-Device
.	O
</s>
<s>
It	O
was	O
produced	O
using	O
65	B-Algorithm
nm	I-Algorithm
technology	O
similar	O
to	O
Yonah	B-Device
.	O
</s>
<s>
Presler	B-Device
communicated	O
with	O
the	O
system	O
using	O
an	O
800	O
MT/s	O
FSB	B-Architecture
,	O
and	O
its	O
two	O
cores	O
communicated	O
also	O
using	O
the	O
FSB	B-Architecture
,	O
just	O
as	O
in	O
Smithfield	B-Device
.	O
</s>
<s>
Presler	B-Device
also	O
included	O
Intel	O
VT-x	O
(	O
formerly	O
Vanderpool	O
)	O
although	O
this	O
was	O
limited	O
to	O
the	O
9x0	O
models	O
,	O
and	O
not	O
in	O
the	O
9x5	O
models	O
Intel	O
64	O
,	O
XD	B-General_Concept
bit	I-General_Concept
,	O
and	O
EIST	B-Device
(	O
Enhanced	O
Intel	B-Device
SpeedStep	I-Device
Technology	O
)	O
.	O
</s>
<s>
Presler	B-Device
was	O
released	O
in	O
the	O
first	O
quarter	O
of	O
2006	O
with	O
a	O
2x2	O
MB	O
Level	O
2	O
cache	O
.	O
</s>
<s>
All	O
steppings	O
of	O
Presler	B-Device
models	O
915	O
,	O
920	O
,	O
925	O
,	O
930	O
,	O
and	O
935	O
,	O
as	O
well	O
as	O
the	O
C1	O
,	O
D0	O
steppings	O
of	O
940	O
,	O
945	O
featured	O
a	O
95	O
watt	O
TDP	B-General_Concept
.	O
</s>
<s>
 [ * ] 	O
The	O
first	O
batch	O
of	O
Presler	B-Device
processors	O
(	O
revision	O
B1	O
)	O
had	O
the	O
EIST	B-Device
feature	O
turned	O
off	O
by	O
a	O
microcode	O
update	O
because	O
of	O
stability	O
issues	O
.	O
</s>
<s>
Chips	O
with	O
working	O
EIST	B-Device
started	O
shipping	O
in	O
Q2	O
2006	O
.	O
</s>
<s>
The	O
Pentium	B-Device
Extreme	I-Device
Edition	I-Device
based	O
on	O
the	O
dual-core	B-Architecture
Pentium	B-Device
D	I-Device
branded	O
Presler	B-Device
was	O
introduced	O
as	O
the	O
955	O
model	O
,	O
at	O
3.46GHz	O
,	O
and	O
used	O
a	O
1066	O
MT/s	O
FSB	B-Architecture
compared	O
to	O
the	O
800	O
MT/s	O
in	O
the	O
non-Extreme	O
edition	O
.	O
</s>
<s>
Both	O
CPUs	B-Device
also	O
feature	O
Hyper-Threading	B-Operating_System
Technology	I-Operating_System
and	O
an	O
unlocked	O
multiplier	O
.	O
</s>
<s>
Overclockers	B-Application
have	O
been	O
able	O
to	O
overclock	B-Application
the	O
core	O
to	O
4.26GHz	O
using	O
air	O
cooling	O
simply	O
by	O
raising	O
the	O
unlocked	O
CPU	B-Device
multiplier	O
.	O
</s>
<s>
The	O
'	O
Presler	B-Device
Extreme	B-Device
Edition	I-Device
 '	O
was	O
intended	O
to	O
only	O
be	O
combined	O
with	O
the	O
Intel	O
975X	O
chipset	O
,	O
it	O
could	O
also	O
work	O
with	O
the	O
955X	O
chipset	O
,	O
though	O
this	O
combination	O
was	O
not	O
supported	O
by	O
Intel	O
.	O
</s>
<s>
The	O
i975X	O
featured	O
the	O
ICH7R	O
southbridge	B-Device
and	O
supported	O
all	O
LGA	B-Device
775	I-Device
(	O
Socket	B-Device
T	I-Device
)	O
Pentium	B-General_Concept
4	I-General_Concept
,	O
Pentium	B-Device
D	I-Device
,	O
and	O
Pentium	B-Device
Extreme	I-Device
Edition	I-Device
branded	O
processors	O
.	O
</s>
<s>
The	O
Pentium	B-Device
D	I-Device
brand	O
was	O
merged	O
with	O
the	O
Pentium	B-General_Concept
4	I-General_Concept
brand	O
and	O
succeeded	O
on	O
July	O
27	O
,	O
2006	O
,	O
by	O
the	O
Core	B-Device
2	I-Device
branded	O
line	O
of	O
processors	O
with	O
the	O
Core	B-Device
microarchitecture	I-Device
released	O
as	O
dual	O
-	O
and	O
quad-core	B-Architecture
processors	I-Architecture
branded	O
Duo	O
,	O
Quad	O
,	O
and	O
Extreme	O
.	O
</s>
<s>
In	O
a	O
single-processor	O
scenario	O
,	O
the	O
CPU-to-northbridge	O
link	O
is	O
point-to-point	B-Architecture
and	O
the	O
only	O
real	O
requirement	O
is	O
that	O
it	O
is	O
fast	O
enough	O
to	O
keep	O
the	O
CPU	B-Device
fed	O
with	O
data	O
from	O
memory	B-Architecture
.	O
</s>
<s>
When	O
assessing	O
the	O
Pentium	B-Device
D	I-Device
,	O
it	O
is	O
important	O
to	O
note	O
that	O
it	O
is	O
essentially	O
two	O
CPUs	B-Device
in	O
the	O
same	O
package	O
and	O
that	O
it	O
will	O
face	O
the	O
same	O
bus	B-Architecture
contention	I-Architecture
issues	O
as	O
a	O
pair	O
of	O
Xeons	B-Device
prior	O
to	O
the	O
Dual	O
Independent	O
Bus	O
architecture	O
introduced	O
with	O
the	O
Dual-Core	B-Architecture
Dempsey	O
Xeons	B-Device
.	O
</s>
<s>
To	O
use	O
a	O
crude	O
analogy	O
one	O
could	O
say	O
that	O
instead	O
of	O
using	O
a	O
single	O
cable	O
between	O
CPU	B-Device
and	O
north	O
bridge	O
,	O
one	O
must	O
use	O
a	O
Y-splitter	O
.	O
</s>
<s>
Leaving	O
aside	O
advanced	O
issues	O
such	O
as	O
cache	B-General_Concept
coherency	I-General_Concept
,	O
each	O
core	O
can	O
only	O
use	O
half	O
of	O
the	O
800	O
MT/s	O
FSB	B-Architecture
bandwidth	O
when	O
under	O
heavy	O
load	O
.	O
</s>
<s>
The	O
competing	O
AMD	O
Athlon	O
64	O
X2	O
,	O
although	O
running	O
at	O
lower	O
clock	O
rates	O
and	O
lacking	O
Hyper-threading	B-Operating_System
,	O
had	O
some	O
significant	O
advantages	O
over	O
the	O
Pentium	B-Device
D	I-Device
,	O
such	O
as	O
an	O
integrated	B-General_Concept
memory	I-General_Concept
controller	I-General_Concept
,	O
a	O
high-speed	O
HyperTransport	B-Device
bus	O
,	O
a	O
shorter	O
pipeline	B-General_Concept
(	O
12	O
stages	O
compared	O
to	O
the	O
Pentium	B-Device
D	I-Device
's	O
31	O
)	O
,	O
and	O
better	O
floating	B-Algorithm
point	I-Algorithm
performance	O
,	O
more	O
than	O
offsetting	O
the	O
difference	O
in	O
raw	O
clock	O
speed	O
.	O
</s>
<s>
Also	O
,	O
while	O
the	O
Athlon	O
64	O
X2	O
inherited	O
mature	O
multi-core	B-Architecture
control	O
logic	O
from	O
the	O
multi-core	B-Architecture
Opteron	O
,	O
the	O
Pentium	B-Device
D	I-Device
was	O
seemingly	O
rushed	O
to	O
production	O
and	O
essentially	O
consisted	O
of	O
two	O
CPUs	B-Device
in	O
the	O
same	O
package	O
.	O
</s>
<s>
Indeed	O
,	O
shortly	O
after	O
the	O
launch	O
of	O
the	O
mainstream	O
Pentium	B-Device
D	I-Device
branded	O
processors	O
(	O
26	O
May	O
2005	O
)	O
and	O
the	O
Athlon	O
64	O
X2	O
(	O
31	O
May	O
2005	O
)	O
,	O
a	O
consensus	O
arose	O
that	O
AMD	O
's	O
implementation	O
of	O
multi-core	B-Architecture
was	O
superior	O
to	O
that	O
of	O
the	O
Pentium	B-Device
D	I-Device
.	O
As	O
a	O
result	O
of	O
this	O
and	O
other	O
factors	O
,	O
AMD	O
surpassed	O
Intel	O
in	O
desktop	B-Device
PC	I-Device
sales	O
at	O
US	O
retail	O
stores	O
for	O
a	O
period	O
of	O
time	O
,	O
although	O
Intel	O
retained	O
overall	O
market	O
leadership	O
because	O
of	O
its	O
exclusive	O
relationships	O
with	O
direct	O
sellers	O
such	O
as	O
Dell	O
.	O
</s>
<s>
In	O
2007	O
,	O
Intel	O
released	O
a	O
new	O
line	O
of	O
desktop	O
processors	O
under	O
the	O
brand	O
Pentium	B-Device
Dual	I-Device
Core	I-Device
,	O
using	O
the	O
Core	B-Device
microarchitecture	I-Device
(	O
which	O
was	O
based	O
upon	O
the	O
Pentium	B-Architecture
M	I-Architecture
architecture	O
,	O
which	O
was	O
itself	O
based	O
upon	O
the	O
Pentium	B-General_Concept
III	I-General_Concept
)	O
.	O
</s>
<s>
The	O
newer	O
Pentium	B-Device
Dual-Core	I-Device
processors	O
give	O
off	O
considerably	O
less	O
heat	O
(	O
65	O
watt	O
max	O
)	O
than	O
the	O
Pentium	B-Device
D	I-Device
(	O
95	O
or	O
130	O
watt	O
max	O
)	O
.	O
</s>
<s>
They	O
also	O
run	O
at	O
lower	O
clock	O
rates	O
,	O
only	O
have	O
up	O
to	O
2	O
MB	O
L2	O
Cache	O
memory	B-Architecture
while	O
the	O
Pentium	B-Device
D	I-Device
has	O
up	O
to	O
2×2	O
MB	O
,	O
and	O
they	O
lack	O
Hyper-threading	B-Operating_System
.	O
</s>
<s>
The	O
Pentium	B-Device
Dual-Core	I-Device
has	O
a	O
wider	O
execution	O
unit	O
(	O
four	O
issues	O
wide	O
compared	O
to	O
the	O
Pentium	B-Device
D	I-Device
's	O
three	O
)	O
and	O
its	O
14	O
stages-long	O
pipeline	B-General_Concept
is	O
less	O
than	O
half	O
the	O
length	O
of	O
the	O
Pentium	B-Device
D	I-Device
's	O
,	O
allowing	O
it	O
to	O
outperform	O
the	O
Pentium	B-Device
D	I-Device
in	O
most	O
applications	O
despite	O
having	O
lower	O
clock	O
speeds	O
and	O
less	O
L2	O
cache	O
memory	B-Architecture
.	O
</s>
