<s>
The	O
Sun	O
Microsystems	O
Ultra	B-Architecture
80	I-Architecture
is	O
a	O
computer	B-Device
workstation	I-Device
that	O
shipped	O
from	O
November	O
1999	O
to	O
2002	O
.	O
</s>
<s>
At	O
launch	O
,	O
it	O
shipped	O
with	O
Solaris	O
2.5.1	O
,	O
and	O
was	O
available	O
in	O
a	O
variety	O
of	O
different	O
configurations	O
,	O
with	O
one	O
(	O
model	O
1450	O
)	O
,	O
two	O
(	O
model	O
2450	O
)	O
or	O
four	O
(	O
model	O
4450	O
)	O
64-bit	B-Device
UltraSPARC	B-General_Concept
II	I-General_Concept
CPUs	B-General_Concept
and	O
up	O
to	O
4	O
GB	O
of	O
RAM	B-Architecture
.	O
</s>
<s>
When	O
released	O
,	O
the	O
Ultra	B-Architecture
80	I-Architecture
was	O
Sun	O
's	O
highest	O
performance	O
workstation	B-Device
.	O
</s>
<s>
The	O
Ultra	B-Architecture
80	I-Architecture
is	O
similar	O
to	O
the	O
lower-cost	O
Sun	O
Ultra	O
60	O
,	O
but	O
is	O
somewhat	O
larger	O
and	O
supports	O
more	O
CPUs	B-General_Concept
and	O
memory	O
.	O
</s>
<s>
Although	O
it	O
was	O
designed	O
as	O
a	O
workstation	B-Device
rather	O
than	O
a	O
server	O
,	O
it	O
may	O
be	O
rack	O
mounted	O
using	O
an	O
optional	O
kit	O
.	O
</s>
<s>
The	O
Enterprise	O
420R	O
is	O
a	O
server	O
product	O
based	O
on	O
the	O
Ultra	B-Architecture
80	I-Architecture
motherboard	O
in	O
a	O
specialized	O
rack-mountable	O
chassis	O
,	O
with	O
custom	O
power	O
supplies	O
and	O
other	O
parts	O
more	O
appropriate	O
for	O
server	O
applications	O
.	O
</s>
<s>
The	O
last	O
order	O
date	O
for	O
the	O
Ultra	B-Architecture
80	I-Architecture
was	O
July	O
2002	O
and	O
the	O
last	O
model	O
stopped	O
shipping	O
in	O
October	O
2002	O
.	O
</s>
<s>
The	O
later	O
Ultra	O
45	O
,	O
introduced	O
in	O
2006	O
,	O
supports	O
a	O
maximum	O
of	O
two	O
CPUs	B-General_Concept
,	O
rather	O
than	O
the	O
four	O
of	O
the	O
Ultra	B-Architecture
80	I-Architecture
.	O
</s>
<s>
The	O
Ultra	B-Architecture
80	I-Architecture
shipped	O
with	O
Solaris	B-Application
2.5.1	O
,	O
and	O
is	O
capable	O
running	O
later	O
versions	O
of	O
Solaris	B-Application
through	O
Solaris	B-Application
10	I-Application
(	O
Oracle	B-Application
Solaris	I-Application
11	O
dropped	O
support	O
for	O
UltraSPARC	B-General_Concept
II	I-General_Concept
,	O
III	O
and	O
IV	O
processors	O
)	O
,	O
as	O
well	O
as	O
Linux	O
and	O
various	O
other	O
UNIX	O
operating	O
systems	O
.	O
</s>
<s>
The	O
Ultra	B-Architecture
80	I-Architecture
cannot	O
run	O
Microsoft	O
Windows	O
directly	O
,	O
although	O
an	O
internal	O
PCI	O
card	O
(	O
SunPCi	B-Device
II	O
pro	O
and	O
similar	O
)	O
from	O
Sun	O
could	O
be	O
fitted	O
to	O
allow	O
the	O
use	O
of	O
Windows	O
.	O
</s>
<s>
Although	O
only	O
sold	O
with	O
either	O
one	O
,	O
two	O
,	O
or	O
four	O
CPUs	B-General_Concept
,	O
the	O
use	O
of	O
three	O
CPUs	B-General_Concept
is	O
a	O
supported	O
configuration	O
.	O
</s>
<s>
The	O
CPUs	B-General_Concept
run	O
at	O
450	O
MHz	O
and	O
have	O
16-KB	O
data	O
and	O
16-KB	O
instruction	O
cache	O
on	O
chip	O
with	O
a	O
secondary	O
4-MB	O
external	O
cache	O
.	O
</s>
<s>
The	O
X1195A	O
is	O
the	O
part	O
number	O
of	O
one	O
of	O
the	O
CPUs	B-General_Concept
.	O
</s>
<s>
The	O
Ultra	B-Architecture
80	I-Architecture
uses	O
144-pin	O
5V	O
60-ns	O
DIMM	B-General_Concept
memory	O
modules	O
of	O
either	O
64	O
or	O
256	O
MB	O
,	O
which	O
should	O
be	O
installed	O
in	O
sets	O
of	O
four	O
identical	O
DIMMs	B-General_Concept
.	O
</s>
<s>
There	O
are	O
16	O
DIMM	B-General_Concept
sockets	O
,	O
so	O
it	O
is	O
possible	O
to	O
fit	O
up	O
to	O
4	O
GB	O
with	O
sixteen	O
256	O
MB	O
modules	O
.	O
</s>
<s>
The	O
memory	O
bus	O
is	O
576	O
bits	O
wide	O
;	O
512	O
bits	O
are	O
used	O
for	O
data	O
and	O
64	B-Device
bits	I-Device
for	O
error	O
correction	O
.	O
</s>
<s>
Performance	O
is	O
improved	O
if	O
2-way	O
interleaving	O
is	O
used	O
(	O
giving	O
512	O
MB	O
or	O
2	O
GB	O
)	O
and	O
maximum	O
performance	O
is	O
achieved	O
with	O
4-way	O
interleaving	O
,	O
in	O
which	O
case	O
all	O
16	O
memory	O
slots	O
would	O
be	O
used	O
,	O
providing	O
the	O
machine	O
with	O
1	O
GB	O
or	O
4	O
GB	O
of	O
RAM	B-Architecture
.	O
</s>
<s>
Half	O
of	O
the	O
Ultra	B-Architecture
80	I-Architecture
's	O
memory	O
must	O
be	O
fitted	O
on	O
the	O
motherboard	O
and	O
the	O
other	O
half	O
on	O
a	O
memory	O
riser	O
board	O
.	O
</s>
<s>
It	O
must	O
be	O
tightened	O
using	O
a	O
torque	O
wrench	O
supplied	O
with	O
the	O
Ultra	B-Architecture
80	I-Architecture
,	O
as	O
detailed	O
in	O
the	O
service	O
manual	O
.	O
</s>
<s>
The	O
Ultra	B-Architecture
80	I-Architecture
takes	O
one	O
or	O
two	O
1	O
"	O
high	O
SCA	O
SCSI	O
disk	O
drives	O
internally	O
.	O
</s>
<s>
The	O
Ultra	B-Architecture
80	I-Architecture
could	O
be	O
purchased	O
new	O
with	O
an	O
optional	O
12/24	O
GB	O
(	O
native/compressed	O
)	O
DDS-3	O
tape	O
drive	O
,	O
but	O
will	O
work	O
with	O
a	O
DDS-4	O
drive	O
,	O
and	O
probably	O
larger	O
tape	O
drives	O
.	O
</s>
<s>
The	O
Ultra	B-Architecture
80	I-Architecture
has	O
four	O
full-size	O
slots	O
compliant	O
with	O
PCI	O
specification	O
version	O
2.1	O
:	O
</s>
<s>
There	O
are	O
two	O
UPA	B-Architecture
graphics	O
slots	O
running	O
at	O
112MHz	O
,	O
supporting	O
one	O
or	O
two	O
Elite3D	O
m3	O
and/or	O
Elite3D	O
m6	O
graphics	O
options	O
.	O
</s>
<s>
The	O
popular	O
Creator3D	O
framebuffer	B-Algorithm
is	O
not	O
supported	O
,	O
but	O
will	O
usually	O
(	O
but	O
not	O
always	O
)	O
work	O
.	O
</s>
<s>
Some	O
Ultra	B-Architecture
80s	I-Architecture
were	O
sold	O
with	O
the	O
PGX32	O
framebuffer	B-Algorithm
,	O
even	O
though	O
its	O
low	O
performance	O
made	O
it	O
more	O
appropriate	O
for	O
use	O
in	O
server	O
rather	O
than	O
workstation	B-Device
applications	O
.	O
</s>
<s>
Although	O
not	O
sold	O
with	O
the	O
Ultra	B-Architecture
80s	I-Architecture
,	O
the	O
later	O
XVR	O
series	O
framebuffers	B-Algorithm
also	O
work	O
,	O
as	O
do	O
the	O
Expert3D	O
series	O
.	O
</s>
<s>
The	O
Sun	O
Ultra	B-Architecture
80	I-Architecture
is	O
fitted	O
with	O
a	O
dual	O
channel	O
Ultra-3	O
SCSI	O
controller	O
.	O
</s>
<s>
The	O
second	O
channel	O
(	O
c1	O
)	O
is	O
used	O
for	O
the	O
external	O
68-pin	O
Ultra	O
wide	O
SCSI	O
connector	O
on	O
the	O
rear	O
of	O
the	O
Ultra	B-Architecture
80	I-Architecture
.	O
</s>
<s>
USB	O
is	O
not	O
officially	O
supported	O
,	O
but	O
various	O
USB	O
boards	O
for	O
PCs	O
have	O
been	O
known	O
to	O
work	O
with	O
Linux	O
and	O
Solaris	B-Application
.	O
</s>
<s>
The	O
Ultra	B-Architecture
80	I-Architecture
was	O
a	O
high	O
end	O
workstation	B-Device
,	O
as	O
it	O
does	O
not	O
use	O
cheaper	O
,	O
mass-produced	O
commodity	O
computer	O
parts	O
as	O
other	O
Ultra	O
workstations	B-Device
(	O
such	O
as	O
the	O
Ultra	B-Architecture
5	I-Architecture
and	O
Ultra	B-Architecture
10	I-Architecture
)	O
do	O
.	O
</s>
<s>
It	O
was	O
designed	O
to	O
address	O
the	O
overheating	O
problems	O
the	O
SPARCstation	B-Architecture
20	I-Architecture
,	O
Sun	O
Microsystem	O
's	O
previous	O
four-processor	O
workstation	B-Device
.	O
</s>
<s>
Support	O
for	O
the	O
Ultra	B-Architecture
80	I-Architecture
ended	O
in	O
October	O
2007	O
.	O
</s>
<s>
In	O
addition	O
to	O
official	O
support	O
,	O
knowledgeable	O
people	O
,	O
(	O
often	O
Sun	O
employees	O
)	O
,	O
are	O
regular	O
visitors	O
to	O
the	O
,	O
and	O
Usenet	B-Application
newsgroups	I-Application
.	O
</s>
<s>
SPEC	O
ceased	O
use	O
of	O
the	O
benchmark	O
before	O
the	O
Ultra	B-Architecture
80	I-Architecture
was	O
released	O
,	O
so	O
the	O
last	O
results	O
submitted	O
to	O
their	O
web	O
site	O
are	O
in	O
the	O
,	O
a	O
little	O
over	O
a	O
year	O
before	O
the	O
Ultra	B-Architecture
80	I-Architecture
was	O
released	O
in	O
November	O
1999	O
.	O
</s>
