hi, fwiw, years before i owned a powermac, i used slackware
exclusively on a tyan tiger dual palomino board with 4 gigs of ram and
had a firegl card that needed a molex connection for extra power to
the gpu. now all of the finery of my memory is gone from this
experience, but the quirks from this setup left an imprint. pc's
experience this phenomenon as well, and as i recall you should always
plug the molex connector of any optical drives, soundcards, gpu's
(anything using one)on different plugs than the hdd. something about
how they dont play nice sticks out. i had this issue as well until i
had figured it out. you'll need to segregate the hard drive to its own
power source, and no there is not route around this. when the
computer posts and boots is similar to a automobile, using more
fuel(or in this case, electricity)upon start up than during normal
operation. the observation of the mdd needing a bit to cool to start
with gpu is somewhat troubling. it seems as though your P/S is on its
way out as well. just sayin.................
On Dec 7, 2012, at 3:34 PM, frrob wrote:
Hello!
I have a MDD G4, 1.25 GHz DP, 10.5.8. Last night I installed a
Radeon 9800 Pro 128M AGP (DVI) card, replacing the stock Radeon 9000
68M (ADC). My main motivation for doing this was to have a 128M
card, so as to run a larger monitor at full resolution. I didn't
really look for the 9800 Pro, but I found it at a good price, and
the info I found indicated that it would work in the MDD. One
salient point if you're not familiar with the 9800 pro - apparently
the AGP bus doesn't provide enough power for it, so it requires a
secondary power connection from a molex connector, using a splitter
from one of the hard drive power connectors.
In fact, the card does work, more or less. I get great display at
1920 x 1080. But there are two problems. If I shut down the machine
and then try to power it back on, one of two things happens: (1) it
won't power on at all. I press the power button, and literally
nothing happens. (2) It will power up and give me the boot chime,
but then show in the center of the screen a small picture/icon of
the Radeon card, with a little ATI logo in the corner, and in the
upper right corner of the graphic a flashing red molex connector and
its wires, signifying that it's not getting power from the molex. Of
course, it was working and getting said power before I shut it down,
so something changed on shutdown, it would seem.
The "solution" I have found to this problem is (if it powered on and
gave me the flashing molex icon) is to manually power it down with
the power button, and (if it didn't power up at all just do this)
unplug the machine for 30 seconds to a minute, then plug it back in.
Then it will start up normally.
Furthermore, if I try to restart, I invariably get the flashing
molex graphic. I then have to manually shut down, unplug, replug,
and power on.
The machine seems to sleep OK. I can put it to sleep and wake it,
seemingly regardless of how long it has been asleep, with no problem.
When this first happened, I thought perhaps a cable or something was
physically pressing the motherboard reset button (it is pretty
cramped in there). But no, the button is clear.
I never had these problems with the stock Radeon 9000 ADC card.
So, what is going on? Something seems to be messing with the card's
ability to get power. Is something interfering somehow with the
machine's power management?
I'd like to use the 9800, but if I can't properly start up and
restart, that's a pretty big PITA. Is the 9800 just too much card
for the MDD?
Is there some solution to this problem that will allow me to use the
9800? Or should I stick with the 9000 or another ADC card?
Thanks!
Rob J.
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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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