<s>
The	O
land	B-Algorithm
grid	I-Algorithm
array	I-Algorithm
(	O
LGA	O
)	O
is	O
a	O
type	O
of	O
surface-mount	O
packaging	O
for	O
integrated	O
circuits	O
(	O
ICs	O
)	O
that	O
is	O
notable	O
for	O
having	O
the	O
pins	O
on	O
the	O
socket	B-General_Concept
(	O
when	O
a	O
socket	B-General_Concept
is	O
used	O
)	O
—	O
as	O
opposed	O
to	O
pins	O
on	O
the	O
integrated	O
circuit	O
,	O
known	O
as	O
a	O
pin	B-Algorithm
grid	I-Algorithm
array	I-Algorithm
(	O
PGA	O
)	O
.	O
</s>
<s>
An	O
LGA	O
can	O
be	O
electrically	O
connected	O
to	O
a	O
printed	O
circuit	O
board	O
(	O
PCB	O
)	O
either	O
by	O
the	O
use	O
of	O
a	O
socket	B-General_Concept
or	O
by	O
soldering	O
directly	O
to	O
the	O
board	O
.	O
</s>
<s>
The	O
land	B-Algorithm
grid	I-Algorithm
array	I-Algorithm
is	O
a	O
packaging	O
technology	O
with	O
a	O
grid	O
of	O
contacts	O
,	O
'	O
lands	O
 '	O
,	O
on	O
the	O
underside	O
of	O
a	O
package	O
.	O
</s>
<s>
The	O
contacts	O
can	O
either	O
be	O
made	O
by	O
using	O
an	O
LGA	O
socket	B-General_Concept
,	O
or	O
by	O
using	O
solder	O
paste	O
.	O
</s>
<s>
LGA	O
packaging	O
is	O
related	O
to	O
ball	B-Algorithm
grid	I-Algorithm
array	I-Algorithm
(	O
BGA	O
)	O
and	O
pin	B-Algorithm
grid	I-Algorithm
array	I-Algorithm
(	O
PGA	O
)	O
packaging	O
.	O
</s>
<s>
Unlike	O
pin	B-Algorithm
grid	I-Algorithm
arrays	I-Algorithm
,	O
land	B-Algorithm
grid	I-Algorithm
array	I-Algorithm
packages	O
are	O
designed	O
to	O
fit	O
either	O
in	O
a	O
socket	B-General_Concept
,	O
or	O
be	O
soldered	O
down	O
using	O
surface	O
mount	O
technology	O
.	O
</s>
<s>
In	O
contrast	O
with	O
a	O
BGA	O
,	O
land	B-Algorithm
grid	I-Algorithm
array	I-Algorithm
packages	O
in	O
non	O
socketed	O
configurations	O
have	O
no	O
balls	O
,	O
and	O
use	O
flat	O
contacts	O
which	O
are	O
soldered	O
directly	O
to	O
the	O
PCB	O
.	O
</s>
<s>
LGA	O
is	O
used	O
as	O
a	O
physical	O
interface	O
for	O
microprocessors	O
of	O
the	O
Intel	B-General_Concept
Pentium	I-General_Concept
,	O
Intel	B-Device
Xeon	I-Device
,	O
Intel	B-Device
Core	I-Device
and	O
AMD	B-General_Concept
Opteron	I-General_Concept
,	O
Threadripper	O
,	O
Epyc	O
,	O
and	O
newer	O
Ryzen	O
families	O
.	O
</s>
<s>
Unlike	O
the	O
pin	B-Algorithm
grid	I-Algorithm
array	I-Algorithm
(	O
PGA	O
)	O
interface	O
found	O
on	O
older	O
AMD	O
and	O
Intel	O
processors	O
,	O
there	O
are	O
no	O
pins	O
on	O
the	O
chip	O
;	O
in	O
place	O
of	O
the	O
pins	O
are	O
pads	O
of	O
bare	O
gold-plated	O
copper	O
that	O
touch	O
protruding	O
pins	O
on	O
the	O
microprocessor	O
's	O
connector	O
on	O
the	O
motherboard	B-Device
.	O
</s>
<s>
By	O
transferring	O
the	O
pins	O
to	O
the	O
motherboard	B-Device
,	O
it	O
is	O
possible	O
to	O
design	O
the	O
socket	B-General_Concept
to	O
physically	O
shield	O
the	O
pins	O
from	O
damage	O
,	O
and	O
the	O
costs	O
of	O
installation	O
damage	O
can	O
be	O
mitigated	O
as	O
motherboards	B-Device
tend	O
to	O
be	O
significantly	O
cheaper	O
than	O
CPUs	O
.	O
</s>
<s>
While	O
LGA	O
sockets	O
have	O
been	O
in	O
use	O
as	O
early	O
as	O
1996	O
by	O
the	O
MIPS	B-Device
R10000	B-General_Concept
,	O
HP	O
PA-8000	B-General_Concept
,	O
and	O
Sun	O
UltraSPARC	B-General_Concept
II	I-General_Concept
processors	O
,	O
the	O
interface	O
did	O
not	O
gain	O
mainstream	O
use	O
until	O
Intel	O
introduced	O
their	O
LGA	O
platform	O
,	O
starting	O
with	O
the	O
5x0	O
and	O
6x0	O
sequence	O
Pentium	B-General_Concept
4	I-General_Concept
(	O
Prescott	O
)	O
in	O
2004	O
.	O
</s>
<s>
All	O
Pentium	B-Device
D	I-Device
and	O
Core	B-Device
2	I-Device
desktop	O
processors	O
use	O
LGA	B-Device
775	I-Device
socket	B-General_Concept
.	O
</s>
<s>
As	O
of	O
Q1	O
2006	O
,	O
Intel	O
switched	O
the	O
Xeon	B-Device
server	O
platform	O
to	O
LGA	O
,	O
starting	O
with	O
the	O
5000-series	O
models	O
.	O
</s>
<s>
AMD	O
introduced	O
their	O
server	O
LGA	O
platform	O
starting	O
with	O
the	O
2000-series	O
Opteron	B-General_Concept
in	O
Q2	O
2006	O
.	O
</s>
<s>
AMD	O
offered	O
the	O
Athlon	O
64	O
FX	O
series	O
on	O
socket	B-General_Concept
1207FX	O
through	O
ASUS	O
's	O
L1N64-SLI	O
WS	O
motherboards	B-Device
.	O
</s>
<s>
It	O
was	O
the	O
only	O
desktop	O
LGA	O
solution	O
offered	O
by	O
AMD	O
at	O
the	O
time	O
until	O
the	O
release	O
of	O
Socket	B-General_Concept
AM5	O
in	O
2022	O
.	O
</s>
<s>
The	O
most	O
recent	O
Intel	O
desktop	O
LGA	O
socket	B-General_Concept
is	O
dubbed	O
LGA	B-Device
1700	I-Device
(	O
Socket	B-General_Concept
H5	O
)	O
,	O
which	O
is	O
used	O
with	O
Intel	O
's	O
Alder	B-Device
Lake	I-Device
series	O
Core	O
i3	O
,	O
i5	O
,	O
and	O
i7	O
families	O
,	O
as	O
well	O
as	O
their	O
lower-end	O
Pentium	B-General_Concept
and	O
Celeron	O
families	O
.	O
</s>
<s>
Their	O
Skylake-X	B-Architecture
Core	B-Device
i7	I-Device
and	O
Core	O
i9	O
families	O
use	O
the	O
LGA	B-Device
2066	I-Device
socket	B-General_Concept
.	O
</s>
<s>
AMD	O
introduced	O
its	O
first	O
consumer	O
LGA	O
socket	B-General_Concept
,	O
called	O
Socket	B-General_Concept
TR4	O
(	O
LGA	O
4094	O
)	O
for	O
its	O
high	O
end	O
desktop	O
platform	O
Ryzen	O
Threadripper	O
processors	O
.	O
</s>
<s>
This	O
socket	B-General_Concept
is	O
physically	O
identical	O
to	O
their	O
Socket	B-General_Concept
SP3	O
for	O
their	O
Epyc	O
server	O
CPUs	O
even	O
though	O
SP3	O
CPUs	O
are	O
not	O
compatible	O
with	O
the	O
desktop	O
X399	O
chipset	O
and	O
vice	O
versa	O
.	O
</s>
<s>
The	O
previous	O
AMD	O
server	O
LGA	O
socket	B-General_Concept
was	O
designated	O
Socket	B-General_Concept
G34	O
(	O
LGA	O
1944	O
)	O
.	O
</s>
<s>
Like	O
Intel	O
,	O
AMD	O
decided	O
to	O
use	O
LGA	O
sockets	O
for	O
their	O
higher	O
pin	O
densities	O
,	O
as	O
a	O
1944-pin	O
PGA	O
would	O
simply	O
be	O
too	O
large	O
for	O
most	O
motherboards	B-Device
.	O
</s>
<s>
LGA	B-Device
771	I-Device
(	O
Socket	B-Device
J	I-Device
)	O
–	O
Note	O
that	O
Socket	B-Device
771	I-Device
is	O
the	O
server	O
counterpart	O
of	O
LGA	B-Device
775	I-Device
and	O
with	O
a	O
bus	O
compatible	O
motherboard	B-Device
,	O
an	O
adapter	O
for	O
LGA	B-Device
775	I-Device
to	O
LGA	B-Device
771	I-Device
can	O
be	O
used	O
to	O
get	O
a	O
Xeon	B-Device
on	O
a	O
consumer	O
motherboard	B-Device
with	O
Socket	B-Device
775	I-Device
.	O
</s>
<s>
LGA	B-Device
1151	I-Device
(	O
Socket	B-Device
H4	I-Device
)	O
–	O
note	O
that	O
two	O
discrete	O
revisions	O
of	O
LGA	B-Device
1151	I-Device
exist	O
;	O
the	O
first	O
revision	O
is	O
only	O
compatible	O
with	O
Skylake	B-Architecture
and	O
Kaby	B-Device
Lake	I-Device
CPUs	O
while	O
the	O
second	O
revision	O
is	O
only	O
compatible	O
with	O
Coffee	B-Device
Lake	I-Device
CPUs	O
.	O
</s>
<s>
LGA	O
2011-3	O
(	O
Socket	B-General_Concept
R3	O
)	O
–	O
note	O
that	O
LGA	O
2011-3	O
is	O
incompatible	O
with	O
LGA	B-Device
2011	I-Device
and	O
is	O
used	O
for	O
Haswell-E	O
and	O
Broadwell-E	B-General_Concept
Intel	B-Device
Core	I-Device
i7	I-Device
extreme	O
processors	O
and	O
the	O
Intel	B-Device
X99	I-Device
chipset	O
.	O
</s>
<s>
It	O
does	O
,	O
however	O
have	O
the	O
same	O
pin	O
count	O
and	O
design	O
as	O
LGA	B-Device
2011	I-Device
.	O
</s>
<s>
Also	O
used	O
for	O
Xeon	B-Device
E5	O
processors	O
and	O
Intel	O
C612	O
chipset	O
.	O
</s>
<s>
LGA	B-Device
2066	I-Device
(	O
Socket	B-Device
R4	I-Device
)	O
–	O
for	O
Intel	O
's	O
X299	B-Device
Chipset	O
and	O
i5	O
,	O
i7	O
and	O
i9	O
X	O
processors	O
from	O
Skylake-X	B-Architecture
and	O
Kaby	B-Device
Lake-X	I-Device
lines	O
.	O
</s>
<s>
There	O
are	O
Xeons	B-Device
also	O
available	O
for	O
this	O
socket	B-General_Concept
.	O
</s>
