<s>
A	O
Riser	B-Architecture
Card	I-Architecture
is	O
a	O
printed	O
circuit	O
board	O
that	O
gives	O
a	O
computer	B-Device
motherboard	I-Device
the	O
option	O
for	O
additional	O
expansion	B-Device
cards	I-Device
to	O
be	O
added	O
to	O
the	O
computer	O
.	O
</s>
<s>
Risers	O
is	O
usually	O
connected	O
to	O
the	O
mainboard	B-Device
's	O
slot	O
through	O
an	O
edge	O
connector	O
,	O
though	O
some	O
,	O
such	O
as	O
NLX	O
and	O
Next	B-Device
Unit	I-Device
of	I-Device
Computing	I-Device
Extreme	O
,	O
have	O
the	O
edge	O
connector	O
on	O
the	O
mainboard	B-Device
instead	O
and	O
have	O
the	O
mainboard	B-Device
plug	O
into	O
Risers	O
.	O
</s>
<s>
In	O
general	O
,	O
the	O
main	O
purpose	O
is	O
to	O
change	O
the	O
orientation	O
of	O
the	O
expansion	B-Device
cards	I-Device
such	O
that	O
they	O
fit	O
a	O
limited	O
space	O
within	O
casing	O
.	O
</s>
<s>
Riser	O
Cables	O
is	O
an	O
evolution	O
of	O
Riser	B-Architecture
Cards	I-Architecture
that	O
utilized	O
improved	O
specifications	O
(	O
specifically	O
the	O
use	O
of	O
PCI	O
Express	O
)	O
and	O
better	O
materials	O
,	O
which	O
allows	O
further	O
distances	O
of	O
data	O
transmission	O
and	O
orientation	O
flexibility	O
than	O
traditional	O
riser	B-Architecture
cards	I-Architecture
.	O
</s>
<s>
These	O
cables	O
used	O
a	O
Riser	B-Architecture
Card	I-Architecture
PCB	O
and	O
an	O
edge	O
connector	O
on	O
each	O
side	O
of	O
the	O
cable	O
,	O
with	O
a	O
copper	O
alloy	O
surrounded	O
by	O
a	O
plastic	O
insulator	O
that	O
allows	O
for	O
the	O
further	O
data	O
transmission	O
distances	O
.	O
</s>
<s>
These	O
cables	O
are	O
now	O
commonly	O
used	O
in	O
modern	O
household	O
gaming	O
PC	B-Device
's	I-Device
to	O
allow	O
for	O
different	O
positioning	O
of	O
PCI	O
Express	B-Device
Cards	I-Device
and	O
GPU	B-Architecture
cards	O
in	O
a	O
Computer	B-General_Concept
case	I-General_Concept
.	O
</s>
<s>
They	O
can	O
additionally	O
be	O
installed	O
into	O
vertical	O
brackets	O
to	O
function	O
similarly	O
to	O
a	O
Riser	B-Architecture
Card	I-Architecture
,	O
but	O
with	O
further	O
flexibility	O
.	O
</s>
<s>
They	O
are	O
also	O
used	O
in	O
small-form-factor	O
PC	B-Device
's	I-Device
to	O
allow	O
for	O
a	O
GPU	B-Architecture
to	O
be	O
positioned	O
behind	O
a	O
computer	B-Device
motherboard	I-Device
.	O
</s>
<s>
Other	O
specifications	O
used	O
for	O
these	O
cards	O
include	O
ExpressCard	B-Device
and	O
PCI-X	O
.	O
</s>
<s>
Riser	B-Architecture
Cards	I-Architecture
have	O
applications	O
in	O
both	O
industrial	O
and	O
consumer	O
spaces	O
.	O
</s>
<s>
In	O
servers	O
,	O
height	O
for	O
expansion	B-Device
cards	I-Device
is	O
limited	O
by	O
rack	O
units	O
.	O
</s>
<s>
This	O
is	O
the	O
size	O
limits	O
that	O
Riser	B-Architecture
Cards	I-Architecture
must	O
follow	O
when	O
being	O
designed	O
.	O
</s>
<s>
Traditionally	O
,	O
a	O
1U	O
Riser	B-Architecture
Card	I-Architecture
can	O
fit	O
1	O
PCI	O
slot	O
.	O
</s>
<s>
This	O
all	O
depends	O
on	O
the	O
size	O
of	O
the	O
expansion	B-Device
card	I-Device
as	O
some	O
are	O
thicker	O
than	O
1	O
PCI	O
slot	O
and	O
will	O
cover	O
up	O
any	O
additional	O
slots	O
.	O
</s>
<s>
In	O
small-form-factor	O
(	O
SFF	O
)	O
computers	O
built	O
by	O
computer	O
enthusiasts	O
,	O
PCI-E	O
Riser	B-Architecture
Cards	I-Architecture
are	O
used	O
in	O
a	O
similar	O
sense	O
to	O
a	O
server	O
application	O
.	O
</s>
<s>
They	O
are	O
used	O
to	O
sandwich	O
a	O
graphics	O
card	O
closer	O
to	O
a	O
computer	B-Device
motherboard	I-Device
and	O
are	O
made	O
to	O
the	O
same	O
heights	O
as	O
server	O
units	O
for	O
most	O
applications	O
.	O
</s>
<s>
Depending	O
on	O
the	O
case	O
,	O
the	O
more	O
flexible	O
PCI	O
Express	O
Riser	O
Cable	O
is	O
used	O
instead	O
,	O
which	O
can	O
even	O
allow	O
the	O
GPU	B-Architecture
to	O
be	O
placed	O
"	O
behind	O
"	O
the	O
mainboard	B-Device
,	O
allowing	O
space-efficient	O
orientation	O
without	O
limiting	O
the	O
GPU	B-Architecture
's	O
airflow	O
.	O
</s>
