Powermac 9500 How many internal drives?

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Joined: Dec 20 2003
Posts: 130

My PM9500 is as follows:
-280 mhz G3
-(2) ATI mach 64 w/4MB VideoRAM each
-Firewire/USB 2.0 PCI
-Asante 100baseT PCI
-Adaptec UW2940 (SCSI)
-(2) Seagate Cheeta 10,000 RPM, 18.5 GB drives
-Apple 12x CD-ROM

What I want to know is...
-Can I mount one of the drives lower and add a SCSI internal ZIP?
-or replace the floppy w/ a ZIP?

Why I would think so...
-the PS has plugs for 4 devices

Why I don't have the cahones...
-I used to have four of those Cheetas in there and I suspect I toasted my PS this way.

I've tried finding relavent info on the net and have turned up nothing.
You guys are my last hope.

TIA,
McNorris

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Joined: Dec 20 2003
Posts: 17
The PS on the 9500 is rated a

The PS on the 9500 is rated at 225W (compared with 150W for a 7200 and 390W for the 9600. The Cheeta 37 GB version has a peak power consumption/heat output of about 40W so that is 80W and the G3 acually draws less than the original 604E. So that 4 of them could be to much for the PS does not surprise me. It could also have been to much heat...

Take care to have good ventilation around the harddisks and perhaps a PCI slot fan that will cool the whole case. The ZIP drive will not contribute to any real heat or power consumption. With the floppy pretty useless anyhow why not put a ZIP there Smile

JetStar's picture
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Joined: Dec 20 2003
Posts: 155
[quote] 390W for the 9600 [/q

Quote:

390W for the 9600

Note that the 2 proc 9600 had a higher rated ps for the power-sucking 604s that are in it. Anyway, why not modify a ATX ps for your 9500? 500w would power alot of chetas (and fans!)... I think that adding some well placed fans could help with the heat alot (those cheatas add ALOT of heat!).

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CubKid's picture
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Joined: Dec 20 2003
Posts: 152
Re: [quote] 390W for the 9600 [/q

Quote:

Note that the 2 proc 9600 had a higher rated ps for the power-sucking 604s that are in it. Anyway, why not modify a ATX ps for your 9500? 500w would power alot of chetas (and fans!)... I think that adding some well placed fans could help with the heat alot (those cheatas add ALOT of heat!).

Is there an article for modding a ATX psu to be used in a 9500 (think 9500 to ATX case hack, that would be somewhat cool).

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JetStar's picture
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Joined: Dec 20 2003
Posts: 155
Yes, here: http://www.xlr8you

Yes, here: http://www.xlr8yourmac.com/systems/ATX_PS_in_8600_9600/ATX_supply_in_8600_9600.html

EDIT: DO'H! That was for a 9600, but that was the only one on xlr8yourmac at the moment.

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CubKid's picture
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Joined: Dec 20 2003
Posts: 152
I imagine...

it wouldnt be too hard to do, just get a multimeter and make some molexes to interface the sets of connectors (9500 has 2 that hook into the logic board). The only thing that would really be an issue is how to get the power supply of the 9500 turned on (like you can do with the ATX) to get voltages. Or just find a diagram with pinouts.. Tongue

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