<s>
The	O
feature	B-Architecture
connector	I-Architecture
was	O
an	O
internal	O
connector	B-Protocol
found	O
mostly	O
in	O
some	O
older	O
ISA	B-Architecture
,	O
VESA	O
Local	O
Bus	O
,	O
and	O
PCI	B-Protocol
graphics	B-Device
cards	I-Device
,	O
but	O
also	O
on	O
some	O
early	O
AGP	B-Architecture
ones	O
.	O
</s>
<s>
It	O
was	O
intended	O
for	O
use	O
by	O
devices	O
which	O
needed	O
to	O
exchange	O
large	O
amounts	O
of	O
data	O
with	O
the	O
graphics	B-Device
card	I-Device
without	O
hogging	O
a	O
computer	O
system	O
's	O
CPU	B-General_Concept
or	O
data	B-General_Concept
bus	I-General_Concept
,	O
such	O
as	O
TV	B-Device
tuner	I-Device
cards	I-Device
,	O
video	O
capture	O
cards	O
,	O
MPEG	O
video	O
decoders	O
(	O
e.g.	O
</s>
<s>
RealMagic	B-Device
)	O
,	O
and	O
first	O
generation	O
3D	B-Architecture
graphic	I-Architecture
accelerator	I-Architecture
cards	O
.	O
</s>
<s>
Early	O
examples	O
include	O
the	O
IBM	B-Device
EGA	I-Device
video	B-Device
adapter	I-Device
.	O
</s>
<s>
Several	O
standards	O
existed	O
for	O
feature	B-Architecture
connectors	I-Architecture
,	O
depending	O
on	O
the	O
bus	O
and	O
graphics	B-Device
card	I-Device
type	O
.	O
</s>
<s>
Most	O
of	O
them	O
were	O
simply	O
an	O
8	O
,	O
16	O
or	O
32-bit	O
wide	O
internal	O
connector	B-Protocol
,	O
transferring	O
data	O
between	O
the	O
graphics	B-Device
card	I-Device
and	O
another	O
device	O
,	O
bypassing	O
the	O
system	O
's	O
CPU	B-General_Concept
and	O
memory	O
completely	O
.	O
</s>
<s>
Their	O
speeds	O
often	O
far	O
exceeded	O
the	O
speed	O
of	O
normal	O
ISA	B-Architecture
or	O
even	O
early	O
PCI	B-Protocol
buses	O
,	O
e.g.	O
</s>
<s>
40	O
MByte/s	O
for	O
a	O
standard	O
ISA-based	O
SVGA	O
,	O
up	O
to	O
150	O
MByte/s	O
for	O
a	O
VESA-based	O
or	O
PCI-based	O
one	O
,	O
while	O
the	O
standard	O
16	O
bit	O
ISA	B-Architecture
bus	I-Architecture
ran	O
at	O
~	O
5.3	O
MByte/s	O
and	O
the	O
VESA	O
bus	O
at	O
up	O
to	O
160	O
MByte/s	O
bandwidth	O
.	O
</s>
<s>
The	O
Feature	B-Architecture
connector	I-Architecture
bandwidths	O
were	O
far	O
beyond	O
the	O
capabilities	O
of	O
e.g.	O
</s>
<s>
a	O
386	B-General_Concept
,	O
486	B-General_Concept
and	O
barely	O
handled	O
by	O
an	O
early	O
Pentium	B-General_Concept
.	O
</s>
<s>
Unlike	O
analog	O
overlay	O
devices	O
however	O
,	O
a	O
feature	B-Architecture
connector	I-Architecture
carried	O
mainly	O
data	O
and	O
essentially	O
allowed	O
an	O
expansion	B-Device
card	I-Device
to	O
access	O
the	O
graphics	B-Device
card	I-Device
Video	O
RAM	O
directly	O
,	O
although	O
directing	O
this	O
data	O
stream	O
to	O
the	O
system	O
's	O
CPU	B-General_Concept
and	O
RAM	O
was	O
not	O
always	O
possible	O
,	O
limiting	O
its	O
usefulness	O
mainly	O
to	O
display	O
purposes	O
.	O
</s>
<s>
Although	O
its	O
use	O
rapidly	O
declined	O
after	O
the	O
introduction	O
of	O
the	O
faster	O
AGP	B-Architecture
internal	B-General_Concept
bus	I-General_Concept
,	O
it	O
was	O
,	O
at	O
its	O
time	O
,	O
the	O
only	O
feasible	O
way	O
to	O
connect	O
certain	O
types	O
of	O
graphics-intensive	O
devices	O
to	O
an	O
average	O
computing	O
system	O
without	O
exceeding	O
the	O
available	O
CPU	B-General_Concept
power	O
and	O
memory	O
bandwidth	O
,	O
and	O
without	O
the	O
disadvantages	O
and	O
limitations	O
of	O
a	O
purely	O
analog	O
overlay	O
.	O
</s>
<s>
The	O
idea	O
of	O
accessing	O
a	O
video	B-Device
card	I-Device
's	O
memory	O
directly	O
resurfaced	O
with	O
the	O
introduction	O
of	O
the	O
Scan-Line	B-Device
Interleave	I-Device
(	O
3dfx	O
SLI	O
)	O
technology	O
,	O
although	O
this	O
technology	O
is	O
aimed	O
at	O
connecting	O
two	O
equally	O
powered	O
and	O
complete	O
graphic	B-Device
cards	I-Device
to	O
produce	O
a	O
single	O
,	O
increased	O
performance	O
visual	O
output	O
,	O
and	O
not	O
e.g.	O
</s>
<s>
directly	O
interfacing	B-Protocol
TV	B-Device
tuner	I-Device
cards	I-Device
.	O
</s>
