<s>
Graphics	O
DDR	O
SDRAM	O
(	O
GDDR	B-Device
SDRAM	I-Device
)	O
is	O
a	O
type	O
of	O
synchronous	O
dynamic	O
random-access	O
memory	O
(	O
SDRAM	O
)	O
specifically	O
designed	O
for	O
applications	O
requiring	O
high	O
bandwidth	O
,	O
e.g.	O
</s>
<s>
graphics	B-Architecture
processing	I-Architecture
units	I-Architecture
(	O
GPUs	B-Architecture
)	O
.	O
</s>
<s>
GDDR	B-Device
SDRAM	I-Device
is	O
distinct	O
from	O
the	O
more	O
widely	O
known	O
types	O
of	O
DDR	O
SDRAM	O
,	O
such	O
as	O
DDR4	O
,	O
although	O
they	O
share	O
some	O
of	O
the	O
same	O
featuresincluding	O
double	O
data	O
rate	O
data	O
transfers	O
.	O
</s>
<s>
,	O
GDDR	B-Device
SDRAM	I-Device
has	O
been	O
succeeded	O
by	O
GDDR2	O
,	O
GDDR3	O
,	O
GDDR4	O
,	O
GDDR5	O
,	O
GDDR5X	O
,	O
GDDR6	O
,	O
and	O
GDDR6X	O
.	O
</s>
<s>
GDDR	B-Device
was	O
initially	O
known	O
as	O
DDR	O
SGRAM	O
(	O
double	O
data	O
rate	O
synchronous	O
graphics	O
RAM	O
)	O
.	O
</s>
<s>
It	O
was	O
commercially	O
introduced	O
as	O
a	O
16Mb	O
memory	O
chip	O
by	O
Samsung	B-Application
Electronics	O
in	O
1998	O
.	O
</s>
