<s>
The	O
Radeon	B-Device
400	I-Device
series	I-Device
is	O
a	O
series	O
of	O
graphics	B-Architecture
processors	I-Architecture
developed	O
by	O
AMD	O
.	O
</s>
<s>
These	O
cards	O
were	O
the	O
first	O
to	O
feature	O
the	O
Polaris	O
GPUs	B-Architecture
,	O
using	O
the	O
new	O
14	B-Algorithm
nm	I-Algorithm
FinFET	O
manufacturing	O
process	O
,	O
developed	O
by	O
Samsung	O
Electronics	O
and	O
licensed	O
to	O
GlobalFoundries	O
.	O
</s>
<s>
The	O
Polaris	O
family	O
initially	O
included	O
two	O
new	O
chips	O
in	O
the	O
Graphics	B-Architecture
Core	I-Architecture
Next	I-Architecture
(	O
GCN	O
)	O
family	O
(	O
Polaris	B-Device
11	I-Device
and	O
Polaris	O
12	O
)	O
.	O
</s>
<s>
Polaris	O
implements	O
the	O
4th	O
generation	O
of	O
the	O
Graphics	B-Architecture
Core	I-Architecture
Next	I-Architecture
instruction	B-General_Concept
set	I-General_Concept
,	O
and	O
shares	O
commonalities	O
with	O
the	O
previous	O
GCN	O
microarchitectures	O
.	O
</s>
<s>
The	O
RX	O
prefix	O
is	O
used	O
for	O
cards	O
that	O
offer	O
over	O
1.5	O
teraflops	O
of	O
performance	O
and	O
80	O
GB/s	O
of	O
memory	O
throughput	O
(	O
with	O
memory	O
compression	O
)	O
,	O
and	O
achieve	O
at	O
least	O
60	O
FPS	O
at	O
1080p	O
in	O
popular	O
games	O
such	O
as	O
Dota	B-Application
2	I-Application
and	O
League	B-Application
of	I-Application
Legends	I-Application
.	O
</s>
<s>
The	O
highest	O
tier	O
,	O
tier	O
9	O
,	O
will	O
feature	O
a	O
memory	O
bus	O
greater	O
than	O
256-bit	O
and	O
shall	O
be	O
aimed	O
at	O
4K	B-Architecture
gaming	O
.	O
</s>
<s>
Therefore	O
,	O
for	O
example	O
,	O
the	O
RX	B-Device
460	I-Device
indicates	O
that	O
it	O
has	O
at	O
least	O
1.5	O
teraflops	O
of	O
performance	O
,	O
100GB/s	O
of	O
memory	O
throughput	O
,	O
has	O
a	O
128-bit	O
memory	O
bus	O
and	O
will	O
be	O
able	O
to	O
achieve	O
60	O
FPS	O
in	O
the	O
previously	O
mentioned	O
games	O
at	O
1080p	O
.	O
</s>
<s>
OpenCL	B-Application
allows	O
use	O
of	O
GPUs	B-Architecture
for	O
highly	O
parallel	O
numeric	O
computation	O
accelerates	O
many	O
scientific	O
software	O
packages	O
against	O
CPU	O
up	O
to	O
factor	O
10	O
or	O
100	O
and	O
more	O
.	O
</s>
<s>
OpenCL	B-Application
1.0	O
to	O
1.2	O
are	O
supported	O
for	O
all	O
chips	O
with	O
Terascale	O
or	O
GCN	O
architectures	O
.	O
</s>
<s>
OpenCL	B-Application
2.0	O
is	O
supported	O
with	O
GCN	O
2nd	O
gen	O
.	O
or	O
higher	O
.	O
</s>
<s>
Any	O
OpenCL	B-Application
2.0	O
conformant	O
card	O
can	O
gain	O
OpenCL	B-Application
2.1	O
and	O
2.2	O
support	O
with	O
only	O
a	O
driver	O
update	O
.	O
</s>
<s>
It	O
includes	O
new	O
hardware	O
schedulers	O
,	O
a	O
new	O
primitive	O
discard	O
accelerator	O
,	O
a	O
new	O
display	O
controller	O
,	O
and	O
an	O
updated	O
UVD	O
that	O
can	O
decode	O
HEVC	B-Algorithm
at	O
4K	B-Architecture
resolutions	I-Architecture
at	O
60	O
frames	O
per	O
second	O
with	O
10	O
bits	O
per	O
color	O
channel	O
.	O
</s>
<s>
On	O
8	O
December	O
2016	O
,	O
AMD	O
released	O
Crimson	O
ReLive	O
drivers	O
(	O
Version	O
16.12.1	O
)	O
,	O
which	O
make	O
GCN-GPUs	O
support	O
VP9	B-Algorithm
decode	O
acceleration	O
up	O
to	O
4K	B-Architecture
@60Hz	O
and	O
twinned	O
with	O
support	O
for	O
Dolby	B-Device
Vision	I-Device
and	O
HDR10	B-Device
.	O
</s>
<s>
Polaris	B-Device
10	I-Device
features	O
2304	O
stream	B-Application
processors	I-Application
across	O
36	O
Compute	B-Operating_System
Units	I-Operating_System
(	O
CUs	O
)	O
,	O
and	O
supports	O
up	O
to	O
8GB	O
of	O
GDDR5	O
memory	O
on	O
a	O
256-bit	O
memory	O
interface	O
.	O
</s>
<s>
The	O
GPU	B-Architecture
replaces	O
the	O
mid-range	O
Tonga	B-Architecture
segment	O
of	O
the	O
Radeon	B-Device
M300	I-Device
line	O
.	O
</s>
<s>
According	O
to	O
AMD	O
,	O
their	O
prime	O
target	O
with	O
the	O
design	O
of	O
Polaris	O
was	O
energy	O
efficiency	O
:	O
Polaris	B-Device
10	I-Device
was	O
initially	O
planned	O
to	O
be	O
a	O
mid-range	O
chip	O
,	O
to	O
be	O
featured	O
in	O
the	O
RX	B-Device
480	I-Device
,	O
with	O
a	O
TDP	B-General_Concept
of	O
around	O
110-135W	O
compared	O
to	O
its	O
predecessor	O
R9	B-Device
380	I-Device
's	O
190W	O
TDP	B-General_Concept
.	O
</s>
<s>
Despite	O
this	O
,	O
the	O
Polaris	B-Device
10	I-Device
chip	O
is	O
anticipated	O
to	O
run	O
the	O
latest	O
DirectX	O
12	O
games	O
"	O
at	O
a	O
resolution	B-General_Concept
of	O
1440p	O
with	O
a	O
stable	O
60	O
frames	O
per	O
second.	O
"	O
</s>
<s>
Polaris	B-Device
11	I-Device
,	O
on	O
the	O
other	O
hand	O
,	O
is	O
to	O
succeed	O
the	O
"	O
Curacao	O
"	O
GPU	B-Architecture
which	O
powers	O
various	O
low-to-mid-range	O
cards	O
.	O
</s>
<s>
It	O
features	O
1024	O
stream	B-Application
processors	I-Application
over	O
16	O
CUs	O
,	O
coupled	O
with	O
up	O
to	O
4GB	O
of	O
GDDR5	O
memory	O
on	O
a	O
128	O
bit	O
memory	O
interface	O
.	O
</s>
<s>
Polaris	B-Device
11	I-Device
has	O
a	O
TDP	B-General_Concept
of	O
75W	O
.	O
</s>
<s>
Many	O
reviewers	O
praised	O
the	O
performance	O
of	O
the	O
RX	B-Device
480	I-Device
8GB	O
when	O
evaluated	O
in	O
light	O
of	O
its	O
$239	O
release	O
price	O
.	O
</s>
<s>
The	O
Tech	O
Report	O
stated	O
that	O
the	O
RX	B-Device
480	I-Device
is	O
the	O
fastest	O
card	O
for	O
the	O
$200	O
segment	O
at	O
the	O
time	O
of	O
its	O
launch	O
.	O
</s>
<s>
Some	O
reviewers	O
discovered	O
that	O
the	O
AMD	O
Radeon	O
RX	B-Device
480	I-Device
violates	O
the	O
PCI	O
Express	O
power	O
draw	O
specifications	O
,	O
which	O
allows	O
a	O
maximum	O
of	O
75	O
watts	O
(	O
66w	O
12v	O
)	O
being	O
drawn	O
from	O
the	O
motherboard	O
's	O
PCI	O
Express	O
slot	O
.	O
</s>
<s>
He	O
was	O
not	O
concerned	O
about	O
the	O
voltage	O
droop	O
due	O
to	O
the	O
specification	O
's	O
8%	O
voltage	O
tolerance	O
,	O
but	O
did	O
note	O
of	O
possible	O
problems	O
in	O
systems	O
where	O
multiple	O
overclocked	O
RX	B-Device
480	I-Device
cards	O
are	O
running	O
in	O
quad	O
CrossFire	O
,	O
or	O
in	O
motherboards	O
that	O
are	O
not	O
designed	O
to	O
withstand	O
high	O
currents	O
,	O
such	O
as	O
budget	O
and	O
older	O
models	O
.	O
</s>
<s>
Some	O
RX	B-Device
480	I-Device
cards	O
designed	O
by	O
AMD	O
's	O
partners	O
include	O
an	O
8-pin	O
power	O
connector	O
which	O
can	O
provide	O
more	O
power	O
than	O
the	O
stock	O
design	O
.	O
</s>
<s>
Dual-Link	B-Protocol
DVI-D	I-Protocol
and	I-Protocol
DVI-I	I-Protocol
at	O
resolutions	O
up	O
to	O
4096×2304	O
are	O
also	O
supported	O
,	O
despite	O
ports	O
not	O
being	O
present	O
on	O
the	O
reference	O
cards	O
.	O
</s>
