<s>
Socket	B-Device
479	I-Device
(	O
mPGA479M	B-Device
)	O
is	O
the	O
CPU	B-General_Concept
socket	I-General_Concept
for	O
the	O
Intel	B-Architecture
Pentium	I-Architecture
M	I-Architecture
and	O
Celeron	B-Device
M	O
mobile	B-General_Concept
processors	I-General_Concept
normally	O
used	O
in	O
laptops	O
,	O
but	O
has	O
also	O
been	O
used	O
with	O
Tualatin-M	O
Pentium	B-General_Concept
III	I-General_Concept
processors	O
.	O
</s>
<s>
Socket	B-Device
478	I-Device
for	O
Pentium	B-General_Concept
4	I-General_Concept
and	O
Celeron	B-Device
series	O
desktop	O
CPUs	O
;	O
</s>
<s>
Socket	B-Device
479	I-Device
for	O
Pentium	B-General_Concept
III-M	I-General_Concept
(	O
released	O
in	O
2001	O
)	O
;	O
</s>
<s>
Socket	B-Device
479	I-Device
for	O
Pentium	B-Architecture
M	I-Architecture
and	O
Celeron	B-Device
M	O
3xx	O
(	O
this	O
was	O
the	O
most	O
common	O
version	O
of	O
the	O
socket	O
,	O
and	O
was	O
released	O
in	O
2003	O
)	O
;	O
</s>
<s>
Socket	B-Device
P	I-Device
for	O
Core	B-Device
2	I-Device
processors	O
.	O
</s>
<s>
Even	O
the	O
Intel	O
's	O
CPU	O
specifications	O
seem	O
to	O
be	O
not	O
clear	O
enough	O
on	O
the	O
distinction	O
and	O
instead	O
use	O
the	O
package/socket	O
designations	O
PGA478	B-Device
or	O
PPGA478	B-Device
for	O
more	O
than	O
1	O
of	O
the	O
above	O
sockets	O
.	O
</s>
<s>
Perhaps	O
adding	O
yet	O
more	O
confusion	O
,	O
some	O
of	O
the	O
PGA-based	O
CPUs	O
above	O
are	O
also	O
available	O
in	O
a	O
BGA	B-Algorithm
(	O
or	O
more	O
precisely	O
,	O
µBGA	O
or	O
even	O
µFCBGA	O
)	O
package	O
which	O
has	O
all	O
of	O
the	O
479	O
contacts	O
(	O
balls	O
)	O
populated	O
.	O
</s>
<s>
For	O
these	O
CPU	O
variants	O
,	O
the	O
Intel	O
's	O
CPU	O
specifications	O
use	O
the	O
designations	O
BGA479	B-Device
,	O
PBGA479	B-Device
or	O
H-PBGA479	B-Device
.	O
</s>
<s>
It	O
should	O
be	O
however	O
pointed	O
out	O
that	O
these	O
designations	O
denote	O
rather	O
the	O
CPU	O
package	O
itself	O
and	O
not	O
the	O
socket	O
,	O
which	O
the	O
BGA	B-Algorithm
variants	O
do	O
not	O
use	O
at	O
all	O
(	O
they	O
are	O
intended	O
to	O
be	O
directly	O
soldered	O
to	O
the	O
mainboard	B-Device
,	O
e.g.	O
</s>
<s>
in	O
an	O
embedded	B-Architecture
system	I-Architecture
)	O
.	O
</s>
<s>
The	O
non-BGA	O
counterparts	O
of	O
these	O
CPUs	O
use	O
any	O
one	O
of	O
the	O
above	O
mentioned	O
sockets	O
,	O
not	O
only	O
the	O
Socket	B-Device
479	I-Device
.	O
</s>
<s>
Socket	B-Device
479	I-Device
has	O
479	O
pin	O
holes	O
.	O
</s>
<s>
Pentium	B-Architecture
M	I-Architecture
processors	O
in	O
PGA	O
package	O
have	O
479	O
pins	O
that	O
plug	O
into	O
this	O
zero	O
insertion	O
force	O
socket	O
.	O
</s>
<s>
Only	O
478	O
pins	O
are	O
electrically	O
connected	O
(	O
B2	O
is	O
reserved	O
and	O
"	O
depopulated	O
on	O
the	O
Micro-FCPGA	B-Device
package	O
"	O
)	O
.	O
</s>
<s>
Although	O
electrically	O
and	O
mechanically	O
similar	O
,	O
Socket	B-Device
478	I-Device
has	O
one	O
pin	O
less	O
,	O
making	O
it	O
impossible	O
to	O
use	O
a	O
Pentium	B-Architecture
M	I-Architecture
processor	O
in	O
a	O
478	O
board	O
.	O
</s>
<s>
CT-479	O
)	O
which	O
allow	O
use	O
of	O
Socket	B-Device
479	I-Device
processors	O
.	O
</s>
<s>
Chipsets	B-Device
which	O
employ	O
this	O
socket	O
for	O
the	O
Pentium	B-Architecture
M	I-Architecture
are	O
the	O
Intel	O
855GM/GME/PM	O
,	O
the	O
Intel	O
915GM/GMS/PM	O
and	O
the	O
VIA	O
family	O
of	O
chipsets	B-Device
such	O
as	O
the	O
VN800	O
.	O
</s>
<s>
While	O
the	O
Intel	O
855GME	O
chipset	B-Device
supports	O
all	O
Pentium	B-Architecture
M	I-Architecture
CPU	O
's	O
,	O
the	O
Intel	O
855GM	O
chipset	B-Device
does	O
not	O
officially	O
support	O
90nm	O
2MB	O
L2	O
cache	O
(	O
Dothan	O
core	B-Device
)	O
models	O
(	O
even	O
though	O
it	O
works	O
,	O
it	O
only	O
works	O
at	O
400FSB	O
,	O
some	O
3rd	O
party/user	O
was	O
able	O
to	O
overclock	O
the	O
FSB	B-Architecture
on	O
855GM/GME/PM	O
to	O
support	O
533FSB	O
Dothan	O
Core	B-Device
)	O
.	O
</s>
<s>
The	O
other	O
difference	O
is	O
the	O
855GM	O
chipset	B-Device
graphics	O
core	B-Device
runs	O
at	O
200MHz	O
while	O
the	O
855GME	O
runs	O
at	O
250MHz	O
.	O
</s>
<s>
In	O
2006	O
,	O
Intel	O
released	O
the	O
successor	O
to	O
Socket	B-Device
479	I-Device
with	O
a	O
revised	O
pinout	O
for	O
its	O
Core	B-Device
processor	O
,	O
called	O
Socket	B-Device
M	I-Device
.	O
This	O
socket	O
has	O
the	O
placement	O
of	O
one	O
pin	O
changed	O
from	O
the	O
Pentium	B-Architecture
M	I-Architecture
version	O
of	O
Socket	B-Device
479	I-Device
;	O
Socket	B-Device
M	I-Device
processors	O
will	O
physically	O
fit	O
into	O
a	O
Socket	B-Device
479	I-Device
,	O
but	O
are	O
electrically	O
incompatible	O
with	O
most	O
versions	O
of	O
the	O
socket479( )	O
.	O
</s>
<s>
Socket	B-Device
M	I-Device
supports	O
a	O
667	O
MT/s	O
FSB	B-Architecture
with	O
the	O
Intel	O
945PM/945GM	O
chipsets	B-Device
.	O
</s>
