<s>
The	O
Cray	B-Device
XT5	I-Device
is	O
an	O
updated	O
version	O
of	O
the	O
Cray	B-Device
XT4	I-Device
supercomputer	B-Architecture
,	O
launched	O
on	O
November	O
6	O
,	O
2007	O
.	O
</s>
<s>
It	O
includes	O
a	O
faster	O
version	O
of	O
the	O
XT4	B-Device
's	O
SeaStar2	O
interconnect	O
router	O
called	O
SeaStar2+	O
,	O
and	O
can	O
be	O
configured	O
either	O
with	O
XT4	B-Device
compute	O
blades	O
,	O
which	O
have	O
four	O
dual-core	B-Architecture
AMD	B-General_Concept
Opteron	I-General_Concept
processor	O
sockets	O
,	O
or	O
XT5	B-Device
blades	O
,	O
with	O
eight	O
sockets	O
supporting	O
dual	O
or	O
quad-core	B-Architecture
Opterons	B-General_Concept
.	O
</s>
<s>
The	O
XT5	B-Device
uses	O
a	O
3-dimensional	O
torus	B-Operating_System
network	I-Operating_System
topology	I-Operating_System
.	O
</s>
<s>
The	O
XT5	B-Device
family	O
run	O
the	O
Cray	B-Operating_System
Linux	I-Operating_System
Environment	O
,	O
formerly	O
known	O
as	O
UNICOS/lc	O
.	O
</s>
<s>
This	O
incorporates	O
SUSE	O
Linux	O
Enterprise	O
Server	O
and	O
Cray	O
's	O
Compute	B-Application
Node	I-Application
Linux	I-Application
.	O
</s>
<s>
The	O
XT5h	O
(	O
hybrid	O
)	O
variant	O
also	O
includes	O
support	O
for	O
Cray	B-Device
X2	I-Device
vector	B-Operating_System
processor	I-Operating_System
blades	O
,	O
and	O
Cray	O
XR1	O
blades	O
which	O
combine	O
Opterons	B-General_Concept
with	O
FPGA-based	O
Reconfigurable	O
Processor	O
Units	O
(	O
RPUs	O
)	O
provided	O
by	O
DRC	O
Computer	O
Corporation	O
.	O
</s>
<s>
The	O
XT5m	O
variant	O
is	O
a	O
mid-ranged	O
supercomputer	B-Architecture
with	O
most	O
of	O
the	O
features	O
of	O
the	O
XT5	B-Device
,	O
but	O
having	O
a	O
2-dimensional	O
torus	B-Operating_System
network	I-Operating_System
topology	I-Operating_System
and	O
scalable	O
to	O
6	O
cabinets	O
.	O
</s>
<s>
In	O
the	O
fall	O
of	O
2008	O
,	O
Cray	O
delivered	O
the	O
Jaguar	B-Device
1.3	O
petaflops	O
XT5	B-Device
system	O
to	O
National	O
Center	O
for	O
Computational	O
Sciences	O
at	O
Oak	O
Ridge	O
National	O
Laboratory	O
.	O
</s>
<s>
The	O
system	O
,	O
with	O
over	O
150,000	O
processing	O
cores	O
,	O
was	O
the	O
second	O
fastest	O
system	O
in	O
the	O
world	O
for	O
the	O
LINPACK	B-Application
benchmark	O
,	O
the	O
fastest	O
system	O
available	O
for	O
open	O
science	O
and	O
the	O
first	O
system	O
to	O
exceed	O
a	O
petaflops	O
sustained	O
performance	O
on	O
a	O
64-bit	O
scientific	O
application	O
.	O
</s>
<s>
Jaguar	B-Device
underwent	O
an	O
upgrade	O
to	O
224,256	O
cores	O
in	O
2009	O
,	O
after	O
which	O
its	O
performance	O
jumped	O
to	O
1.75	O
petaflops	O
,	O
taking	O
it	O
to	O
the	O
number	O
one	O
position	O
in	O
the	O
34th	O
edition	O
of	O
the	O
TOP500	B-Operating_System
list	O
in	O
fall	O
2009	O
.	O
</s>
<s>
Another	O
XT5	B-Device
system	O
,	O
Kraken	O
,	O
with	O
112,896	O
cores	O
and	O
1.17	O
petaflops	O
,	O
as	O
of	O
June	O
2012	O
was	O
at	O
position	O
number	O
21	O
in	O
the	O
TOP500	B-Operating_System
list	O
.	O
</s>
