<s>
The	O
Power	B-Device
Macintosh	I-Device
8500	O
(	O
sold	O
as	O
the	O
Power	B-Device
Macintosh	I-Device
8515	O
in	O
Europe	O
and	O
Japan	O
)	O
is	O
a	O
personal	B-Device
computer	I-Device
designed	O
,	O
manufactured	O
and	O
sold	O
by	O
Apple	O
Computer	O
from	O
August	O
1995	O
to	O
February	O
1997	O
.	O
</s>
<s>
Billed	O
as	O
a	O
high-end	O
graphics	O
computer	O
,	O
the	O
Power	B-Device
Macintosh	I-Device
8500	O
was	O
initially	O
released	O
with	O
a	O
120MHz	O
PowerPC	O
604	O
,	O
and	O
unlike	O
earlier	O
Power	B-Device
Macintosh	I-Device
machines	O
,	O
the	O
CPU	O
was	O
mounted	O
on	O
an	O
upgradeable	O
daughtercard	B-Device
.	O
</s>
<s>
Though	O
slower	O
than	O
the	O
132MHz	O
Power	B-Device
Macintosh	I-Device
9500	I-Device
,	O
the	O
first-generation	O
8500	O
featured	O
several	O
audio	O
and	O
video	O
(	O
S-Video	O
and	O
composite	O
video	O
)	O
in/out	O
ports	O
not	O
found	O
in	O
the	O
9500	O
.	O
</s>
<s>
In	O
fact	O
,	O
the	O
8500	O
incorporated	O
near-broadcast	O
quality	O
(	O
640×480	O
)	O
A/V	O
input	O
and	O
output	O
and	O
was	O
the	O
first	O
personal	B-Device
computer	I-Device
to	O
do	O
so	O
,	O
but	O
no	O
hard	O
drive	O
manufactured	O
in	O
1997	O
could	O
sustain	O
the	O
18	O
MB/s	O
data	O
rate	O
required	O
to	O
capture	O
video	O
at	O
that	O
resolution	O
.	O
</s>
<s>
Later	O
,	O
special	O
"	B-Device
AV	I-Device
"	I-Device
hard	I-Device
drives	I-Device
were	O
made	O
available	O
that	O
could	O
delay	O
thermal	O
recalibration	O
until	O
after	O
a	O
write	O
operation	O
had	O
completed	O
.	O
</s>
<s>
With	O
special	O
care	O
to	O
minimize	O
fragmentation	B-Architecture
,	O
these	O
drives	O
were	O
able	O
to	O
keep	O
up	O
with	O
the	O
8500	O
's	O
video	O
circuitry	O
.	O
</s>
<s>
The	O
8500	O
was	O
introduced	O
alongside	O
the	O
Power	B-Device
Macintosh	I-Device
7200	I-Device
and	O
7500	B-Device
at	O
the	O
1995	O
MacWorld	O
Expo	O
in	O
Boston	O
.	O
</s>
<s>
They	O
also	O
noted	O
that	O
the	O
8500	O
run	O
an	O
average	O
of	O
24	O
to	O
44	O
percent	O
faster	O
than	O
a	O
similarly-clocked	O
Intel	B-General_Concept
Pentium	I-General_Concept
chip	O
,	O
with	O
the	O
performance	O
nearly	O
double	O
on	O
graphics	O
and	O
publishing	O
tasks	O
.	O
</s>
<s>
It	O
was	O
succeeded	O
by	O
the	O
Power	B-Device
Macintosh	I-Device
8600	I-Device
in	O
February	O
1997	O
.	O
</s>
