Sunday, May 28, 2006, 5:25:38 PM, Jules wrote:
Gerhard Lenerz wrote:
> Anyway... life goes on: Now I need to dismantle the whole beast to get
> to the PSU and then there is the final question... will I find a
> replacement if it's FUBAR? Probably I can get an Power Series (IRIS4D)
> PSU to work - at least these look pretty similar. If I get the pinout
> right, it shouldn't do much harm if the PSU is stronger I guess (say
> 1500W instead of 1000W, right?).
Make sure it's strong enough, though. I think the
'slimline' 4D machines all
used the same supply regardless of graphics options, but presumably the supply
was different to that used in the double-width 4D machines.
I can't tell much about IRIS powersupplies as I have first-hand
experience with only one machine and that was even built during the
days when the 4Ds were already hitting the market (1988 I think;
boards are from around 1983-1986 though).
The smaller IRIS4D (Personal Iris) do use something completely
different as a PSU and they are rated at ~300W or something close to
that. All other IRIS4D (Professional Iris, PowerSeries and Crimson in
both Twin Tower as well as Single Tower enclosures) use sompletely
sealed PSUs (like it's done in PCs today). They are all manufactured
by two or three different companies and share the same size. They are
all rated between 1000 and 1500W as far as I know.
For closer inspection I need to dig out the PSU anyway so I might get
the chance to compare part numbers against the one that is used in the
other machines. Too bad that removing it is such a PITA... way to many
screws and pieces of sheetmetal in the way on any of these machines.
They are built like tanks...
If your system's older than the machine that
provides the supply you may well
find that it draws more current too...
Good thing is, the IRIS3130 is in a rather lowend configuration. SGI
in these days apparently shipped stripped down backplanes either to
3rd party vendors (CDC in this case) or for given applications (ICEM;
labelling on backup tapes indicate some work was done in aircraft
I'm sure it can be done, though. Or use a supply
from a totally different
system - just if there's lots of monitoring/feedback between the system and
the supply then you might have fun trying to figure out how to rig it all up.
I've been down the street one time with replacing a Personal Iris PSU
with an AT-style PC supply. Works, but the PSU is crapping out when
drives are installed. Well it's 200W and the machine likely draws too
much on some voltage lines with full height 5.25" drives installed but
runs fine without.
(I'm probably not making any sense - coffee not
kicked in yet :-)
You were making a sense... at least you told me exactly what I wanted
to hear... ;-)
Gerhard mailto:mail at g-lenerz.de
Old SGI Stuff http://sgistuff.g-lenerz.de/