<s>
SGI	B-General_Concept
Onyx	I-General_Concept
is	O
a	O
series	O
of	O
visualization	B-Application
systems	O
designed	O
and	O
manufactured	O
by	O
SGI	O
,	O
introduced	O
in	O
1993	O
and	O
offered	O
in	O
two	O
models	O
,	O
deskside	O
and	O
rackmount	O
,	O
codenamed	O
Eveready	O
and	O
Terminator	O
respectively	O
.	O
</s>
<s>
The	O
Onyx	O
's	O
basic	O
system	O
architecture	O
is	O
based	O
on	O
the	O
SGI	B-Application
Challenge	I-Application
servers	O
,	O
but	O
with	O
graphics	O
hardware	O
.	O
</s>
<s>
The	O
Onyx	O
was	O
employed	O
in	O
early	O
1995	O
for	O
development	B-Application
kits	I-Application
used	O
to	O
produce	O
software	O
for	O
the	O
Nintendo	B-Operating_System
64	I-Operating_System
and	O
,	O
because	O
the	O
technology	O
was	O
so	O
new	O
,	O
the	O
Onyx	O
was	O
noted	O
as	O
the	O
major	O
factor	O
for	O
the	O
impressively	O
high	O
price	O
of	O
–	O
for	O
such	O
kits	O
.	O
</s>
<s>
The	O
Onyx	O
was	O
succeeded	O
by	O
the	O
Onyx2	B-General_Concept
in	O
1996	O
and	O
was	O
discontinued	O
on	O
March	O
31	O
,	O
1999	O
.	O
</s>
<s>
The	O
deskside	O
variant	O
can	O
accept	O
one	O
CPU	B-Device
board	O
,	O
and	O
the	O
rackmount	O
variant	O
can	O
take	O
up	O
to	O
six	O
CPU	B-Device
boards	O
.	O
</s>
<s>
Both	O
models	O
were	O
launched	O
with	O
the	O
IP19	O
CPU	B-Device
board	O
with	O
one	O
,	O
two	O
,	O
or	O
four	O
MIPS	B-General_Concept
R4400	I-General_Concept
CPUs	B-Device
,	O
initially	O
with	O
100	O
and	O
150MHz	O
options	O
and	O
later	O
increased	O
to	O
200	O
and	O
250MHz	O
.	O
</s>
<s>
Later	O
,	O
the	O
IP21	O
CPU	B-Device
board	O
was	O
introduced	O
,	O
with	O
one	O
or	O
two	O
R8000	B-General_Concept
microprocessors	O
at	O
75	O
or	O
90MHz	O
;	O
machines	O
with	O
this	O
board	O
were	O
referred	O
to	O
as	O
POWER	O
Onyx	O
.	O
</s>
<s>
Finally	O
,	O
SGI	O
introduced	O
the	O
IP25	O
board	O
with	O
one	O
,	O
two	O
,	O
or	O
four	O
R10000	B-General_Concept
CPUs	B-Device
at	O
195MHz	O
.	O
</s>
