<s>
Socket	B-Device
423	I-Device
is	O
a	O
423-pin	O
CPU	B-General_Concept
socket	I-General_Concept
used	O
by	O
the	O
first	O
generation	O
of	O
Pentium	B-General_Concept
4	I-General_Concept
processors	B-General_Concept
,	O
based	O
on	O
the	O
Willamette	O
core	O
.	O
</s>
<s>
It	O
was	O
replaced	O
by	O
Socket	B-Device
478	I-Device
in	O
2001	O
.	O
</s>
<s>
This	O
socket	O
houses	O
any	O
processor	O
designed	O
in	O
the	O
Socket	B-Device
423	I-Device
package	O
.	O
</s>
<s>
It	O
was	O
replaced	O
by	O
Socket	B-Device
478	I-Device
,	O
which	O
being	O
microPGA	O
was	O
cheaper	O
to	O
make	O
.	O
</s>
<s>
The	O
processors	B-General_Concept
used	O
with	O
this	O
socket	O
also	O
have	O
a	O
locked	O
multiplier	O
which	O
means	O
that	O
they	O
are	O
not	O
overclockable	O
unless	O
the	O
front	O
side	O
bus	O
frequency	O
is	O
increased	O
.	O
</s>
<s>
The	O
"	O
PowerLeap	O
PL-P4/N	O
"	O
is	O
a	O
device	O
developed	O
in	O
the	O
form	O
of	O
a	O
socket	O
adapter	O
allowing	O
the	O
use	O
of	O
Socket	B-Device
478	I-Device
processors	B-General_Concept
in	O
Socket	B-Device
423	I-Device
.	O
</s>
