<s>
Octane	O
series	O
of	O
IRIX	B-Operating_System
workstations	B-Device
was	O
developed	O
and	O
sold	O
by	O
SGI	O
in	O
the	O
2000s	O
.	O
</s>
<s>
Octane	O
and	O
Octane2	O
are	O
two-way	O
multiprocessing-capable	O
workstations	B-Device
,	O
originally	O
based	O
on	O
the	O
MIPS	O
Technologies	O
R10000	B-General_Concept
microprocessor	O
.	O
</s>
<s>
Newer	O
Octanes	O
are	O
based	O
on	O
the	O
R12000	B-General_Concept
and	O
R14000	B-General_Concept
.	O
</s>
<s>
The	O
Octane	O
is	O
the	O
direct	O
successor	O
to	O
the	O
Indigo2	B-Application
,	O
and	O
was	O
succeeded	O
by	O
the	O
Tezro	B-Device
,	O
and	O
its	O
immediate	O
sibling	O
is	O
the	O
O2	B-Device
.	O
</s>
<s>
It	O
is	O
a	O
series	O
of	O
Intel	O
based	O
deskside	O
systems	O
,	O
as	O
a	O
Xeon-based	O
workstation	B-Device
with	O
1	O
or	O
2	O
3U	O
EATX	O
trays	O
,	O
or	O
as	O
cluster	O
servers	O
with	O
10	O
system	O
trays	O
configured	O
with	O
up	O
to	O
10	O
Twin	B-Architecture
Blade	I-Architecture
nodes	O
or	O
20	O
Intel	O
ATOM	O
MINI-ITX	O
nodes	O
.	O
</s>
<s>
Xtalk	O
does	O
not	O
use	O
a	O
system	B-Architecture
bus	I-Architecture
,	O
but	O
a	O
Crossbow	O
application-specific	O
integrated	O
circuit	O
(	O
ASIC	O
)	O
,	O
referred	O
to	O
as	O
Xbow	O
,	O
a	O
dynamic	O
crossbar	O
switch	O
that	O
connects	O
the	O
XIO	B-Architecture
ports	O
to	O
the	O
hub	O
.	O
</s>
<s>
One	O
of	O
the	O
ports	O
is	O
used	O
for	O
the	O
processor	O
and	O
memory	O
subsystem	O
,	O
one	O
is	O
available	O
for	O
PCI-X	O
expansion	O
,	O
and	O
four	O
are	O
XIO	B-Architecture
slots	O
(	O
packet-based	O
high-bandwidth	O
bus	O
,	O
somewhat	O
similar	O
to	O
HyperTransport	B-Device
)	O
.	O
</s>
<s>
This	O
makes	O
it	O
very	O
similar	O
to	O
a	O
single	O
node	O
of	O
the	O
Origin	B-Application
200	I-Application
system	O
.	O
</s>
<s>
The	O
XIO	B-Architecture
can	O
be	O
bridged	O
to	O
PCI-X	O
,	O
using	O
a	O
chip	O
named	O
BRIDGE	O
.	O
</s>
<s>
This	O
bridging	O
includes	O
the	O
system	O
board	O
(	O
for	O
the	O
IOC3	O
multi-I/O	O
chip	O
,	O
two	O
ISP1040B	O
SCSI	B-Architecture
controllers	O
and	O
RAD1	O
audio	O
)	O
,	O
MENET	O
cards	O
(	O
four	O
IOC3s	O
)	O
and	O
the	O
PCI	O
cage	O
(	O
used	O
for	O
PCI	O
cards	O
in	O
Octane	O
)	O
.	O
</s>
<s>
The	O
Octane	O
uses	O
ARCS	B-Device
boot	O
firmware	B-Application
,	O
like	O
all	O
contemporary	O
SGI	O
computer	O
systems	O
.	O
</s>
<s>
The	O
Octane	O
supports	O
64	O
MB	O
to	O
8	O
GB	O
of	O
system	O
memory	O
,	O
using	O
up	O
to	O
eight	O
proprietary	O
200-pin	O
DIMMs	B-General_Concept
.	O
</s>
<s>
The	O
memory	O
subsystem	O
has	O
vast	O
reserves	O
of	O
bandwidth	O
that	O
can	O
be	O
directly	O
served	O
by	O
the	O
Xbow	O
router	O
to	O
any	O
XIO	B-Architecture
card	O
.	O
</s>
<s>
It	O
acts	O
as	O
a	O
bridge	O
between	O
the	O
processor	O
,	O
the	O
memory	O
(	O
SDRAM	O
)	O
and	O
the	O
XIO	B-Architecture
bus	O
.	O
</s>
<s>
These	O
are	O
updated	O
XIO	B-Architecture
versions	O
of	O
Solid	O
Impact	O
(	O
SI	O
)	O
,	O
High	O
Impact	O
(	O
SI+T	O
)	O
and	O
Maximum	O
Impact	O
(	O
MXI	O
)	O
from	O
the	O
SGI	B-Application
Indigo2	I-Application
that	O
were	O
internally	O
designated	O
by	O
SGI	O
as	O
MARDIGRAS	O
.	O
</s>
<s>
Later	O
Octanes	O
and	O
Octane2	O
's	O
support	O
the	O
SGI	B-General_Concept
VPro	I-General_Concept
graphics	O
board	O
series	O
,	O
designated	O
'	O
ODYSSEY	O
 '	O
.	O
</s>
<s>
The	O
Octane	O
cases	O
are	O
large	O
(	O
30x40x35	O
cm	O
)	O
and	O
heavy	O
(	O
25kg	O
)	O
,	O
yet	O
there	O
are	O
no	O
internal	O
5.25	O
"	O
drive	B-Device
bays	I-Device
,	O
so	O
external	O
CD-ROM	B-Device
drives	O
must	O
be	O
connected	O
if	O
desired	O
.	O
</s>
<s>
Extensions	O
include	O
video	O
I/O	O
,	O
audio	O
I/O	O
,	O
networking	O
,	O
real-time	O
video	O
compression	O
boards	O
,	O
and	O
external	O
storage	O
options	O
(	O
through	O
SCSI	B-Architecture
,	O
Fibre	O
Channel	O
or	O
FireWire	O
)	O
.	O
</s>
<s>
Octanes	O
can	O
use	O
standard	O
PCI	O
cards	O
with	O
the	O
optional	O
PCI	O
cardcage	O
(	O
which	O
provides	O
one	O
half-length	O
and	O
two	O
full-length	O
5V	O
64-bit	O
PCI	O
slots	O
)	O
,	O
or	O
a	O
PCI	O
to	O
XIO	B-Architecture
adapter	O
(	O
known	O
as	O
a	O
'	O
shoehorn	O
 '	O
which	O
provides	O
a	O
single	O
3.3/5V	O
64-bit	O
PCI	O
slot	O
)	O
.	O
</s>
<s>
Octane	O
series	O
has	O
two	O
SCSI	B-Architecture
controllers	O
that	O
supports	O
Ultra	B-Architecture
Wide	I-Architecture
SCSI	I-Architecture
devices	O
.	O
</s>
<s>
Systems	O
can	O
have	O
a	O
maximum	O
of	O
three	O
internal	O
3.5	O
"	O
SCSI	B-Architecture
SCA	O
devices	O
,	O
using	O
proprietary	O
mounting	O
sleds	O
that	O
are	O
also	O
compatible	O
with	O
the	O
Origin	B-Application
2000	I-Application
,	O
Origin	B-Application
200	I-Application
and	O
Onyx2	B-General_Concept
.	O
</s>
<s>
An	O
external	O
Ultra	B-Architecture
Wide	I-Architecture
SCSI	I-Architecture
port	O
is	O
used	O
for	O
connecting	O
external	O
devices	O
.	O
</s>
<s>
The	O
SGI	B-Device
Octane	I-Device
with	O
IMPACT-class	O
graphics	O
was	O
first	O
supported	O
by	O
IRIX	B-Operating_System
version	O
6.4	O
.	O
</s>
<s>
VPro-class	O
graphics	O
have	O
been	O
supported	O
since	O
IRIX	B-Operating_System
version	O
6.5.10	O
for	O
V6	O
and	O
V8	O
,	O
with	O
V10	O
and	O
V12	O
graphics	O
supported	O
as	O
of	O
6.5.11	O
(	O
or	O
6.5.10	O
with	O
a	O
special	O
driver	O
patch	O
)	O
.	O
</s>
<s>
Linux	B-Application
and	O
OpenBSD	B-Operating_System
have	O
had	O
support	O
.	O
</s>
