<s>
The	O
Macintosh	B-Device
Quadra	I-Device
950	I-Device
(	O
also	O
sold	O
with	O
additional	O
software	O
as	O
the	O
Workgroup	B-Device
Server	I-Device
95	I-Device
)	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
March	O
1992	O
to	O
October	O
1995	O
.	O
</s>
<s>
It	O
replaced	O
the	O
Quadra	B-Device
900	I-Device
that	O
was	O
introduced	O
several	O
months	O
earlier	O
,	O
increasing	O
the	O
CPU	B-General_Concept
clock	O
rate	O
of	O
its	O
68040	B-Device
CPU	B-General_Concept
from	O
to	O
,	O
and	O
improving	O
the	O
graphics	O
support	O
.	O
</s>
<s>
With	O
a	O
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
Card	I-Device
installed	O
,	O
this	O
computer	O
is	O
known	O
as	O
the	O
Power	O
Macintosh	O
950	O
.	O
</s>
<s>
In	O
1993	O
,	O
the	O
950	O
was	O
overtaken	O
in	O
performance	O
by	O
the	O
less	O
expensive	O
Quadra	B-Device
800	I-Device
and	O
840AV	B-Device
.	O
</s>
<s>
The	O
newer	O
Quadras	B-Device
had	O
the	O
addition	O
of	O
interleaved	B-General_Concept
RAM	O
,	O
as	O
well	O
as	O
an	O
enhanced	O
video	O
system	O
and	O
SCSI	B-Architecture
bus	O
.	O
</s>
<s>
However	O
,	O
their	O
more	O
compact	O
(	O
mini-tower	O
)	O
case	O
offered	O
less	O
expansion	O
capability	O
,	O
so	O
the	O
950	O
(	O
due	O
to	O
its	O
mid-tower	O
case	O
allowing	O
6	O
slots	O
to	O
be	O
supported	O
)	O
was	O
kept	O
in	O
continued	O
production	O
for	O
the	O
server	O
market	O
,	O
outliving	O
the	O
800	O
and	O
840AV	B-Device
.	O
</s>
<s>
Also	O
,	O
the	O
Quadra	B-Device
800	I-Device
was	O
not	O
capable	O
of	O
operating	O
at	O
24-bit	O
color	O
,	O
regardless	O
of	O
how	O
much	O
VRAM	O
is	O
installed	O
or	O
whether	O
an	O
external	O
video	O
card	O
is	O
used	O
,	O
while	O
the	O
Quadra	B-Device
900	I-Device
and	O
950	O
were	O
capable	O
of	O
24-bit	O
color	O
.	O
</s>
<s>
The	O
Quadra	B-Device
950	I-Device
was	O
replaced	O
by	O
the	O
PowerPC-based	O
Power	B-Device
Macintosh	I-Device
9500	I-Device
in	O
May	O
1995	O
,	O
with	O
sales	O
continuing	O
until	O
October	O
.	O
</s>
<s>
It	O
was	O
the	O
last	O
Macintosh	B-Device
Quadra	I-Device
sold	O
by	O
Apple	O
,	O
and	O
one	O
of	O
the	O
last	O
68k	O
models	O
to	O
be	O
discontinued	O
,	O
due	O
to	O
its	O
high	O
RAM	O
capacity	O
and	O
large	O
number	O
of	O
NuBus	B-Device
slots	O
.	O
</s>
<s>
The	O
Workgroup	B-Device
Server	I-Device
95	I-Device
was	O
succeeded	O
by	O
the	O
Workgroup	B-Device
Server	I-Device
9150	I-Device
.	O
</s>
<s>
The	O
logic	O
board	O
has	O
five	O
NuBus	B-Device
slots	O
and	O
a	O
Processor	B-Device
Direct	I-Device
Slot	I-Device
,	O
but	O
due	O
to	O
the	O
positioning	O
of	O
the	O
PDS	O
it	O
is	O
not	O
possible	O
to	O
use	O
one	O
of	O
the	O
NuBus	B-Device
slots	O
when	O
a	O
PDS	O
card	O
is	O
installed	O
.	O
</s>
<s>
The	O
NuBus-90	O
standard	O
is	O
partially	O
supported	O
,	O
allowing	O
for	O
cards	O
to	O
run	O
at	O
20	O
MHz	O
,	O
and	O
two	O
of	O
the	O
slots	O
provide	O
25	O
watts	O
of	O
power	O
instead	O
of	O
the	O
usual	O
15	O
watts	O
.	O
</s>
<s>
The	O
Workgroup	B-Device
Server	I-Device
95	I-Device
models	O
include	O
the	O
"	O
Workgroup	B-Device
Server	I-Device
PDS	O
Card	O
"	O
,	O
which	O
provides	O
three	O
capabilities	O
:	O
Two	O
SCSI	B-Architecture
controllers	O
with	O
two	O
internal	O
SCSI	B-Architecture
connectors	O
(	O
plus	O
one	O
external	O
connector	O
)	O
;	O
a	O
DMS	O
SCSI	B-Architecture
control	O
chip	O
that	O
reduces	O
I/O	O
load	O
on	O
the	O
main	O
CPU	B-General_Concept
;	O
and	O
128	O
KB	O
of	O
SRAM	O
which	O
is	O
used	O
as	O
an	O
L2	O
cache	O
.	O
</s>
<s>
The	O
Quadra	B-Device
950	I-Device
was	O
announced	O
on	O
March	O
18	O
,	O
with	O
dealers	O
receiving	O
machines	O
around	O
May	O
18	O
.	O
</s>
<s>
Macintosh	B-Device
Quadra	I-Device
950	I-Device
:	O
33	O
MHz	O
68040	B-Device
CPU	B-General_Concept
.	O
</s>
<s>
Workgroup	B-Device
Server	I-Device
95	I-Device
:	O
Sold	O
in	O
several	O
configurations	O
,	O
all	O
of	O
which	O
include	O
a	O
33	O
MHz	O
68040	B-Device
CPU	B-General_Concept
and	O
a	O
PDS	O
card	O
containing	O
a	O
fast	O
SCSI	B-Architecture
connection	O
.	O
</s>
<s>
File/Print	O
:	O
16	O
MB	O
RAM	O
,	O
500	O
MB	O
HDD	O
,	O
DDS-DC	B-Architecture
digital	O
tape	O
drive	O
,	O
256	O
KB	O
L2	O
cache	O
.	O
</s>
<s>
File/Print	O
:	O
32	O
MB	O
RAM	O
,	O
1000	O
MB	O
HDD	O
,	O
DDS-DC	B-Architecture
digital	O
tape	O
drive	O
,	O
AppleShare	B-General_Concept
Pro	I-General_Concept
,	O
512	O
KB	O
L2	O
cache	O
.	O
</s>
<s>
Database	O
:	O
32	O
MB	O
RAM	O
,	O
230	O
MB	O
and	O
500	O
MB	O
HDDs	O
,	O
DDS-DC	B-Architecture
digital	O
tape	O
drive	O
,	O
256	O
KB	O
L2	O
cache	O
.	O
</s>
<s>
Database	O
:	O
48	O
MB	O
RAM	O
,	O
230	O
MB	O
and	O
1000	O
MB	O
HDDs	O
,	O
DDS-DC	B-Architecture
digital	O
tape	O
drive	O
,	O
512	O
KB	O
L2	O
cache	O
.	O
</s>
