| Power output problem? [message #15966] |
Thu, 13 September 2012 18:30  |
Frank Dutra
Messages: 12
Registered: September 2012
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Hi all,
I may have finally hit the wall so to speak, in my attempts at
keeping my trusty old G4 (dual 450 mystic) alive. A recent attempt to
upgrade my video card to a flashed Radeon 9800 pro that required
patching into the power supply via the connector cables that service
the original cd/dvd drive (upgraded to Pioneer 106D). The original
cable also provided an extension for plugging into an optional zip
drive or other optical device, which I have dedicated to 2 internal
2tb drives via a seritek pci sata card (2 port internal only). The
Radeon video card relies on yet another jumper cable to patch into
the optical power circuit which physically works, but I lose both
SATA drives (won't mount) when powering up. Oddly enough, if only one
drive is connected I am able to boot from it regardless of which
drive it is so I doubt there are any master/slave issues. WOuld like
to resolve this issue so I can renew backing up the SATAs and try a
Leopard upgrade on one. DOes anyone know if this is a voltage issue?
The easiest fix that I see would be to disconnect the Pioneer optical
drive and put it in an externally powered box but I have no idea if
that will work? Thanks
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| Re: Power output problem? [message #15979 is a reply to message #15966] |
Thu, 13 September 2012 18:47  |
Valter Prahlad
Messages: 87
Registered: September 2012
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Il giorno 14-09-2012 0:30, Frank Dutra ha scritto:
> I may have finally hit the wall so to speak, in my attempts at
> keeping my trusty old G4 (dual 450 mystic) alive. A recent attempt to
> upgrade my video card to a flashed Radeon 9800 pro
IMHO, it seems to me you're asking too much from your G4.
Besides, I think a 9800 Pro would be overkill for that machine, the
processor/memory/bus would be a bottleneck in comparison.
Anyway, it could be the G4 power supply is not enough to sustain all those
peripherals.
> The easiest fix that I see would be to disconnect the Pioneer optical
> drive and put it in an externally powered box but I have no idea if
> that will work?
If the problem is too much power request from the PSU, I don't think the
optical drive would change much. OTOH, the 2TB drive could make a
difference.
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| Re: Power output problem? [message #15992 is a reply to message #15981] |
Thu, 13 September 2012 21:39 |
Frank Dutra
Messages: 12
Registered: September 2012
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Junior Member |
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> I've had a lot more connected to a G4 than a couple of drives and a
> 9800. My guess is that your power supply is getting marginal. After 12
> years likely the capacitors in the power supply have started going.
> You could recap the power supply or do an atx conversion. Another
> option is to power some of the extra equipment from an external power
> supply, though if your power supply is on the way out then that'd be a
> short term solution
Thanks Wayne,
If I read you right, you think lowering the overall power demand
might help rather than just lowering the demand on the optic drive 2
SATA drives, And 9800 circuit.
I have the original OEM 30 gb drive plus a another 40 gb ATA drive
that I really don't need except for some older OS's,,, I'm guessing
the power demands on the 2 ATA must be at least the power drain of
one of the 2tb SATAs?
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Frank Dutra
PO Box 3402
Nantucket MA 02584
<mailto: fdutra1@gmail.com>
Voice: (508) 292-1528
FAX: (815) 377-2407
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| Re: Power output problem? [message #16016 is a reply to message #15979] |
Thu, 13 September 2012 19:05 |
Angel
Messages: 6
Registered: September 2012
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I agree with Mr. Prahlad,
You're asking too much of your Mystic's 338W PSU. Also, Radeon 9800 Pro has a higher TDP than the GeForce4 Ti 4600 which was, if I remember it correctly, the higher-end video card intended for this line of Power Macs.
I would desist from upgrading the video card with that 9800 Pro, which nowadays shouldn't make so much of a difference, and go for another card with lower power consumption.
El 14/09/2012, a las 00:47, Valter Prahlad escribió:
> Il giorno 14-09-2012 0:30, Frank Dutra ha scritto:
>
>> I may have finally hit the wall so to speak, in my attempts at
>> keeping my trusty old G4 (dual 450 mystic) alive. A recent attempt to
>> upgrade my video card to a flashed Radeon 9800 pro
> IMHO, it seems to me you're asking too much from your G4.
> Besides, I think a 9800 Pro would be overkill for that machine, the
> processor/memory/bus would be a bottleneck in comparison.
>
> Anyway, it could be the G4 power supply is not enough to sustain all those
> peripherals.
>
>> The easiest fix that I see would be to disconnect the Pioneer optical
>> drive and put it in an externally powered box but I have no idea if
>> that will work?
> If the problem is too much power request from the PSU, I don't think the
> optical drive would change much. OTOH, the 2TB drive could make a
> difference.
>
> --
> You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs.
> The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml
> To post to this group, send email to g3-5-list@googlegroups.com
> For more options, visit this group at http://groups.google.com/group/g3-5-list
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| Re: Power output problem? [message #16151 is a reply to message #15981] |
Sat, 15 September 2012 11:39 |
Frank Dutra
Messages: 12
Registered: September 2012
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Junior Member |
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> I've had a lot more connected to a G4 than a couple of drives and a
> 9800. My guess is that your power supply is getting marginal. After 12
> years likely the capacitors in the power supply have started going.
> You could recap the power supply or do an atx conversion. Another
> option is to power some of the extra equipment from an external power
> supply, though if your power supply is on the way out then that'd be a
> short term solution
OK, so I fired up this morning and was reading my mail when I had a
total freeze up. Rebooted (had to pull the power cord) and was
treated to a very nice graphic of the Radeon 9800 card with a
flashing red power plug and no startup chime,,, guess you were spot
on Wayne. Any advice on doing an ATX conversion ? Any heat problems?
Thanks
FYI anyone else following this thread. I was able to restart after
disconnecting my 2 internal ATA drives (have them mirrored on the
SATAs). I of course then had to try plugging in both SATA drives and
voilla!,,, feels good to have my backups up to date again and will
pick up a power supply to have on hand for that fateful morning when
the inevitable happens.
Thanks everyone.
--
Frank Dutra
PO Box 3402
Nantucket MA 02584
<mailto: fdutra1@gmail.com>
Voice: (508) 292-1528
FAX: (815) 377-2407
--
You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs.
The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml
To post to this group, send email to g3-5-list@googlegroups.com
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| Re: Power output problem? [message #16275 is a reply to message #16151] |
Sun, 16 September 2012 02:42 |
Charles Lenington
Messages: 45
Registered: September 2012
Karma: 0
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Member |
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On 9/15/12 10:39 AM, Frank Dutra wrote:
>> I've had a lot more connected to a G4 than a couple of drives and a
>> 9800. My guess is that your power supply is getting marginal. After 12
>> years likely the capacitors in the power supply have started going.
>> You could recap the power supply or do an atx conversion. Another
>> option is to power some of the extra equipment from an external power
>> supply, though if your power supply is on the way out then that'd be a
>> short term solution
>
> OK, so I fired up this morning and was reading my mail when I had a
> total freeze up. Rebooted (had to pull the power cord) and was treated
> to a very nice graphic of the Radeon 9800 card with a flashing red
> power plug and no startup chime,,, guess you were spot on Wayne. Any
> advice on doing an ATX conversion ? Any heat problems?
>
> Thanks
>
> FYI anyone else following this thread. I was able to restart after
> disconnecting my 2 internal ATA drives (have them mirrored on the
> SATAs). I of course then had to try plugging in both SATA drives and
> voilla!,,, feels good to have my backups up to date again and will
> pick up a power supply to have on hand for that fateful morning when
> the inevitable happens.
>
> Thanks everyone.
If you can find a surplus dealer w/ working power supply or an old AT
case with you could set the PS on desk w/ extension wires to power
drives and/or extra fans. Just remember to switch on AT ps before computer.
Pet peeve: power switches on back of device next to power cords that
fall out too easily when trying to use switch.
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You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs.
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