<s>
The	O
generically	O
named	O
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
Card	I-Device
(	O
code	O
named	O
STP	O
)	O
is	O
a	O
central	B-General_Concept
processing	I-General_Concept
unit	I-General_Concept
upgrade	O
card	O
sold	O
by	O
Apple	O
Computer	O
,	O
designed	O
for	O
many	O
Motorola	O
68040-powered	O
Macintosh	B-Device
LC	I-Device
,	O
Quadra	B-Device
and	O
Performa	B-Device
models	O
.	O
</s>
<s>
The	O
card	O
contains	O
a	O
PowerPC	O
601	O
CPU	O
and	O
plugs	O
into	O
the	O
68040	B-Device
CPU	O
socket	O
of	O
the	O
upgraded	O
machine	O
.	O
</s>
<s>
The	O
Processor	O
upgrade	O
card	O
required	O
the	O
original	O
CPU	O
be	O
plugged	O
back	O
into	O
the	O
card	O
itself	O
,	O
and	O
gave	O
the	O
machine	O
the	O
ability	O
to	O
run	O
in	O
its	O
original	O
68040	B-Device
configuration	O
,	O
or	O
through	O
the	O
use	O
of	O
a	O
software	O
configuration	O
utility	O
allowed	O
booting	O
as	O
a	O
PowerPC	O
601	O
computer	O
running	O
at	O
twice	O
the	O
original	O
speed	O
in	O
MHz	O
(	O
50MHz	O
or	O
66MHz	O
)	O
with	O
32	O
KB	O
of	O
L1	O
Cache	O
,	O
256	O
KB	O
of	O
L2	O
Cache	O
and	O
a	O
PowerPC	O
Floating	B-General_Concept
Point	I-General_Concept
Unit	I-General_Concept
available	O
to	O
software	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
requires	O
and	O
shipped	O
with	O
System	B-Operating_System
7.5	I-Operating_System
.	O
</s>
<s>
Apple	O
described	O
the	O
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
Card	I-Device
as	O
giving	O
a	O
performance	O
increase	O
of	O
"	O
two	O
to	O
four	O
times	O
"	O
for	O
general	O
purposes	O
,	O
or	O
"	O
up	O
to	O
10	O
times	O
"	O
for	O
floating	O
point	O
intensive	O
programs	O
.	O
</s>
<s>
While	O
the	O
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
did	O
not	O
plug	O
into	O
the	O
LC	O
Processor	B-Device
Direct	I-Device
Slot	I-Device
,	O
due	O
to	O
power	O
used	O
and	O
the	O
space	O
taken	O
by	O
the	O
upgrade	O
,	O
LC	O
PDS	O
cards	O
could	O
not	O
be	O
fitted	O
while	O
the	O
card	O
was	O
installed	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
Card	I-Device
can	O
bring	O
a	O
68k	O
Mac	O
,	O
that	O
can	O
normally	O
only	O
go	O
up	O
to	O
Mac	O
OS	O
8.1	O
,	O
to	O
be	O
upgraded	O
to	O
Mac	O
OS	O
8.6	O
or	O
newer	O
as	O
long	O
as	O
the	O
card	O
is	O
always	O
in	O
use	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
Card	I-Device
can	O
only	O
run	O
up	O
to	O
Mac	O
OS	O
9.1	O
as	O
9.2	O
onwards	O
require	O
a	O
G3	O
Processor	O
as	O
a	O
minimum	O
.	O
</s>
<s>
DayStar	O
Digital	O
manufactured	O
the	O
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
Card	I-Device
for	O
Apple	O
,	O
sold	O
the	O
same	O
card	O
as	O
their	O
Daystar	O
PowerCard	O
601-50/66	O
and	O
also	O
manufactured	O
a	O
Daystar	O
PowerCard	O
601/100	O
which	O
reached	O
100MHz	O
.	O
</s>
