[csimon2]

The OEM Radeon 9600 in my new G5 has died on me, and while I wait on a replacement, would it be possible to install an OEM Radeon 9000 from a Dual G4 1.25GHz? I know there is the whole AGP 8x v. 4x thing to worry about, and I don't know if 8x AGP slots are backwards compatible with 4x cards. Thanks.

BTW, out of curiosity, would it be possible to install a 8x AGP OEM Radeon 9600 in the Dual G4 4x AGP slot? Any complications to be aware of?

Thanks again for anyone's help.

[P]

AGP is fully backwards compatible. Of course if you put a 4x board in an 8x slot and 8x board in a 4x slot, both boards will run at 4x.

[D'Espice]

What he said, you can put it in and it'll work just fine.

[csimon2]

Thanks guys. That's what I suspected. Kind of like placing ATA100 HDs in ATA33 buses, they work, but no real performance gain "theoretically" should be expected. My main concern however was also whether or not OEM cards are interchangable? If taking an OEM card and placing it into another machine will require any special hacks or operating precautions? I plan on reinstalling the OS at the same time so drivers shouldn't be an issue.

[AssassyN]

But I heard an OEM Radeon 9800 Pro (like in the G5s) won't work in a Dual G4...true?

[olePigeon]

Now what would be cool is if you could flash a PC Radeon 9000 PCI (though you really shouldn't, mind you ), you could have one kickass dual setup.

[rhogue islander]

Mmmmm, I read somewhere that the ADC connection to the motherboard was different in the new G5's.

If true OEM cards from G4's and G5's are not interchangeable. I could be wrong though.

[reader50]

Originally posted by barefeats:
9/10/03 -- Many of you have written me puzzled why ATI's retail Mac version of the Radeon 9800 Pro does not come with ADC connector and 8X support. I shared your puzzlement. Here's an explanation from ATI:

"ADC for the G4 is different from the G5. The power connector on the motherboard is not in the same place. Therefore the following is true:

G4 ADC cards will not fit into a G5 at all.

G5 ADC cards fit into a G4, but the ADC power tab will not be connected - and the cards won't boot anyway.

The only cards that can work on both machines are NON-ADC AGP 4x cards" (like the retail Radeon 9800 Pro ME)

[D'Espice]

Damn, sounds like Apple screwed up big time... that can't be good.

[csimon2]

Wow. Thanks for the clarification reader50. I had not heard about that. I do trust the guy at barefeats knows what he is talking about, so that nixes this idea. Oh well, would have been nice though.