<s>
The	O
IBM	B-Device
System	I-Device
p	I-Device
is	O
a	O
high-end	O
line	O
of	O
RISC	B-Architecture
(	O
Power	B-Device
)	O
/UNIX	O
-based	O
servers	O
.	O
</s>
<s>
It	O
was	O
the	O
successor	O
of	O
the	O
RS/6000	B-Device
line	O
,	O
and	O
predecessor	O
of	O
the	O
IBM	B-Device
Power	I-Device
Systems	I-Device
server	B-Application
series	O
.	O
</s>
<s>
The	O
previous	O
RS/6000	B-Device
line	O
was	O
originally	O
a	O
line	O
of	O
workstations	O
and	O
servers	O
.	O
</s>
<s>
The	O
first	O
System	B-Device
p	I-Device
server	B-Application
line	O
was	O
named	O
the	O
eServer	B-Application
pSeries	O
in	O
2000	O
as	O
part	O
of	O
the	O
e-Server	O
branding	O
initiative	O
.	O
</s>
<s>
In	O
2004	O
,	O
with	O
the	O
advent	O
of	O
the	O
POWER5	B-Device
processor	O
,	O
the	O
server	B-Application
family	O
was	O
rebranded	O
the	O
e''Server	O
p5	O
.	O
</s>
<s>
In	O
2005	O
,	O
following	O
IBM	O
's	O
move	O
to	O
streamline	O
its	O
server	B-Application
and	O
storage	O
brands	O
worldwide	O
,	O
and	O
incorporating	O
the	O
"	O
System	O
"	O
brand	O
with	O
the	O
Systems	O
Agenda	O
,	O
the	O
family	O
was	O
again	O
renamed	O
to	O
System	B-Device
p5	I-Device
.	O
</s>
<s>
The	O
System	B-Device
p5	I-Device
now	O
encompassed	O
the	O
IBM	B-Device
OpenPower	I-Device
product	O
line	O
.	O
</s>
<s>
In	O
2007	O
,	O
after	O
the	O
introduction	O
of	O
the	O
POWER6	B-Device
processor	O
models	O
,	O
the	O
last	O
rename	O
under	O
the	O
System	B-Device
p	I-Device
brand	O
dropped	O
the	O
p	O
(	O
numbered	O
)	O
designation	O
.	O
</s>
<s>
In	O
April	O
2008	O
,	O
IBM	O
announced	O
a	O
rebranding	O
of	O
the	O
System	B-Device
p	I-Device
and	O
its	O
unification	O
with	O
the	O
mid-range	O
System	B-Device
i	I-Device
platform	O
.	O
</s>
<s>
The	O
resulting	O
product	O
line	O
was	O
called	O
IBM	B-Device
Power	I-Device
Systems	I-Device
.	O
</s>
<s>
Whereas	O
the	O
previous	O
RS/6000	B-Device
line	O
used	O
a	O
mix	O
of	O
early	O
POWER	B-Device
and	O
PowerPC	B-Architecture
processors	I-Architecture
,	O
when	O
pSeries	O
came	O
along	O
,	O
this	O
had	O
evolved	O
into	O
RS64-III	B-Device
and	O
POWER3	B-General_Concept
across	O
the	O
board	O
—	O
POWER3	B-General_Concept
for	O
its	O
excellent	O
floating-point	O
performance	O
and	O
RS64	B-Device
for	O
its	O
scalability	O
,	O
throughput	O
,	O
and	O
integer	O
performance	O
.	O
</s>
<s>
IBM	O
developed	O
the	O
POWER4	B-Device
processor	O
to	O
replace	O
both	O
POWER3	B-General_Concept
and	O
the	O
RS64	B-Device
line	O
in	O
2001	O
.	O
</s>
<s>
Since	O
then	O
,	O
System	B-Device
p	I-Device
machines	O
evolved	O
to	O
use	O
the	O
POWER5	B-Device
but	O
also	O
the	O
PowerPC	B-General_Concept
970	I-General_Concept
for	O
the	O
low-end	O
and	O
blade	O
systems	O
.	O
</s>
<s>
The	O
last	O
System	B-Device
p	I-Device
systems	O
used	O
the	O
POWER6	B-Device
processor	O
,	O
such	O
as	O
the	O
POWER6-based	O
System	B-Device
p	I-Device
570	O
and	O
the	O
JS22	O
blade	O
.	O
</s>
<s>
In	O
addition	O
,	O
during	O
the	O
SuperComputing	B-Architecture
2007	O
(	O
SC07	O
)	O
conference	O
in	O
Reno	O
,	O
IBM	O
introduced	O
a	O
new	O
POWER6-based	O
System	B-Device
p	I-Device
575	O
with	O
32	O
POWER6	B-Device
cores	O
at	O
4.7	O
GHz	O
and	O
up	O
to	O
256	O
GB	O
of	O
RAM	B-Architecture
with	O
water	O
cooling	O
.	O
</s>
<s>
All	O
IBM	B-Device
System	I-Device
p5	I-Device
and	O
IBM	O
e''Server	O
p5	O
machines	O
support	O
DLPAR	B-Device
(	O
Dynamic	B-Device
Logical	I-Device
Partitioning	I-Device
)	O
with	O
Virtual	O
I/O	O
and	O
Micro-partitioning	B-Device
.	O
</s>
<s>
System	B-Device
p	I-Device
generally	O
uses	O
the	O
AIX	B-Application
operating	I-Application
system	I-Application
and	O
,	O
more	O
recently	O
,	O
64-bit	B-Device
versions	O
of	O
the	O
Linux	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
The	O
IBM	O
p690	O
was	O
,	O
at	O
the	O
time	O
of	O
its	O
release	O
in	O
late	O
2001	O
,	O
the	O
flagship	O
of	O
IBM	O
's	O
high-end	O
Unix	B-Application
servers	O
during	O
the	O
POWER4	B-Device
era	O
of	O
processors	O
.	O
</s>
<s>
It	O
was	O
built	O
to	O
run	O
IBM	B-Application
AIX	I-Application
Unix	B-Application
,	O
although	O
it	O
is	O
possible	O
to	O
run	O
a	O
version	O
of	O
Linux	B-Application
minus	O
some	O
POWER4-specific	O
features	O
.	O
</s>
<s>
It	O
could	O
support	O
up	O
to	O
32	O
(	O
1.5	O
,	O
1.7	O
or	O
1.9GHz	O
)	O
POWER4+	B-Device
processors	O
and	O
1	O
TB	O
of	O
RAM	B-Architecture
,	O
which	O
weighs	O
well	O
over	O
1000kg	O
.	O
</s>
<s>
It	O
was	O
used	O
in	O
a	O
supercomputer	B-Architecture
at	O
Forschungszentrum	O
Jülich	O
in	O
2004	O
,	O
and	O
was	O
discontinued	O
in	O
late	O
2005	O
.	O
</s>
<s>
System	B-Device
p	I-Device
was	O
rebranded	O
to	O
Power	B-Device
Systems	I-Device
in	O
2008	O
.	O
</s>
<s>
OpenPower	O
was	O
the	O
name	O
of	O
a	O
range	O
of	O
servers	O
in	O
the	O
System	B-Device
p	I-Device
line	O
from	O
IBM	O
.	O
</s>
<s>
They	O
featured	O
IBM	O
's	O
POWER5	B-Device
CPUs	B-General_Concept
and	O
run	O
only	O
64-bit	B-Device
versions	O
of	O
Linux	B-Application
.	O
</s>
<s>
IBM	O
's	O
own	O
UNIX	B-Application
variant	O
,	O
AIX	B-Application
is	O
not	O
supported	O
since	O
the	O
OpenPower	O
servers	O
are	O
not	O
licensed	O
for	O
this	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Before	O
2005	O
,	O
OpenPower	O
belonged	O
to	O
the	O
eServer	B-Application
product	O
line	O
but	O
were	O
eventually	O
rolled	O
into	O
the	O
IBM	O
's	O
Power	B-Device
Systems	I-Device
product	O
portfolio	O
.	O
</s>
