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Powermac G4 MDD & Gforce TI 4600 (problem)

Dimitris1980

Dimitris1980

macrumors newbie
Original poster
Jun 21, 2008
11
2
Athens Greece
Hello,

i replaced my gforce2 32mb vram with the gforce 4600 but when i turn the mac on, after 3-4 seconds it powers off. What should i do?
 
Dimitris1980

Dimitris1980

macrumors newbie
Original poster
Jun 21, 2008
11
2
Athens Greece
mistake: the previous graphics card is the nVidia GeForce 4mx 32MB


i don't know if it is important but my mdd has installed from the seller an atx power supply.


Thank you.
 
G

Graveyard

macrumors regular
Jul 29, 2009
110
1
Romania
Is the Geforce 4 a Mac card? If it is a pc card, did you flash it with the necessary rom before putting it in the Mac? If it's agp 8x card, did you tape pins 3&11? How can we give you a hand when you don't provide any details?
 
Dimitris1980

Dimitris1980

macrumors newbie
Original poster
Jun 21, 2008
11
2
Athens Greece
It is a GForce Mac Edition. The truth is that I don't know about these technical info. I have never replaced a power supply. All i know is that the guy that sold me the power mac G4 mdd had replaced the power supply with an ATX.
 
Hrududu

Hrududu

macrumors 68020
Jul 25, 2008
2,299
627
Central US
Got a picture of the inside of that Mac? I'd be interested to see how he rigged up an ATX PSU in a MDD, and if it looks like he even did it right.
 
Intell

Intell

macrumors P6
Jan 24, 2010
18,955
509
Inside
Could it be that the Mac card will not boot because it gets its power from the ADC pins, but with an ATX power supply there's no power going to the ADC slot?
 
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