<s>
Scan-Line	B-Device
Interleave	I-Device
(	O
SLI	O
)	O
from	O
3dfx	O
is	O
a	O
method	O
for	O
linking	O
two	O
(	O
or	O
more	O
)	O
video	B-Device
cards	I-Device
or	O
chips	O
together	O
to	O
produce	O
a	O
single	O
output	O
.	O
</s>
<s>
It	O
is	O
an	O
application	O
of	O
parallel	B-Operating_System
processing	I-Operating_System
for	O
computer	O
graphics	O
,	O
meant	O
to	O
increase	O
the	O
processing	O
power	O
available	O
for	O
graphics	O
.	O
</s>
<s>
However	O
,	O
the	O
original	O
Voodoo	O
Graphics	B-Device
card	I-Device
and	O
the	O
VSA-100	O
were	O
also	O
SLI-capable	O
.	O
</s>
<s>
Nvidia	O
Corporation	O
reintroduced	O
the	O
SLI	O
acronym	O
in	O
2004	O
(	O
though	O
it	O
now	O
stands	O
for	O
Scalable	B-Device
Link	I-Device
Interface	I-Device
)	O
.	O
</s>
<s>
NVIDIA	O
's	O
SLI	O
,	O
compared	O
to	O
3dfx	O
's	O
SLI	O
,	O
is	O
modernized	O
to	O
use	O
graphics	B-Device
cards	I-Device
interfaced	O
over	O
the	O
PCI	O
Express	O
bus	O
.	O
</s>
<s>
3dfx	O
's	O
SLI	O
design	O
was	O
the	O
first	O
attempt	O
,	O
in	O
the	O
consumer	O
PC	O
market	O
,	O
at	O
combining	O
the	O
rendering	O
power	O
of	O
two	O
video	B-Device
cards	I-Device
.	O
</s>
