I got an overclocked to 1.5 Ghz PowerMac G4 MDD.

It has 2Giga of RAM on 4 sticks / 512MB.

It has a Radeon 9700, I have tapped the two pins in order to make it work.

It also has a SoundBlaster Live and a USB 2.0 PCI card.

The CPU is cooled by two extra fans.

The machine works GREAT under MacOSX, it is tested with full Heavy Load, in ultra hot and many hours.

On MorphOS I have this very STRANGE issue.

On the first boot the mahcine works fine. It plays videos form usb sticks, it plays web radio, it plays mp3, everything I have tested goes on well.

If I let some time to pass lets say 30-40 minutes and make a Reboot -after the warning of unregistered version-. The mahcine would NOT work well under MorphOS:

Glitches are heard instead of sounds through the SB Live.
The mouse cursor would stuck if I move it. It would move for a while, then it would stuck again, the it would move again.

Anyway the system is NOT stable.

I tested with different memory sticks, letting only 1.5 Giga on board.
I changed the PCI slot of the cards.
I re installed MorphOS -and Chrysalis-.
The gfx card is getting a little hot, I left some backplates of the machine totally open to allow some more air to come.

Nothing changed.

Of MacOSX I have none of this problems.

Any ideas?

If you can test it on a older radeon card 7000-9200.

It has been well known for a bit that mos on powermacs experiences this type of randomness.
Most people just reboot and the issue goes away.
I have always had random failures (not too often) where the screen goes bonkers and a reboot fixes the issue.

Perhaps mos is not running your fans at full speed and mac os x is.
This would lead to overheating.

If the fans is the case what can I do? I am building this mahcine to have my next registered MorphOS system, it is a shame that it would end up to be useless.

You said its overclocked.
Are any of the fans custom?
How are they hooked up?
To the one fan hookup on the motherboard?

They hooked up on the heatsink of the CPU and they take power from an (extra?) power output on the mobo as I can understand. I have not overclocked it, I bought it from a friend already overclocked and tested but under MacOSX.

[ Edited by CountRaven 20.09.2013 - 02:22 ]

After i get rid of the original powermac case my morphos rig is much cooler, just recase it on a atx case and you get rid of the overheating problems.

Your Hackintosh project is great.

I checked the fans -by eye- they seem to work on the same speed both in MorphOS and MaxOSX, perhaps this is the problem or the graphics card. It has a big fan but it gets really hot.... Who knows...

I do not want to sound rude but I think this Apple support trip starts to become tricky.

Can someone release MorphOS dedicated exclusive new Hardware on a affordable price and officially supported?

This is a wish.






[ Edited by CountRaven 20.09.2013 - 16:20 ]