Hi-
You're welcome!
Are there any hacks to enable 3D graphics acceleration for these cards (Radeon 9800 Pro & nVIDIA Geforce 6800 GT) in Mac OS 9?
To my knowledge, no one has seen the need to provide an extension, driver, or what not, to gain hardware acceleration with latter generation cards in OS 9.
You could use your Radeon 9200 PCI card in OS 9 to gain some hardware acceleration.
It will coexist with a 9800 or such in the AGP slot.
Are there any performance scales out there to show these cards compared in Mac OS 9 to others in 3D performance?
Do you have a specific program need?
Because, if only for basic OS 9 operation, there really isn't a problem with latter generation cards.
Example:
I use a OS 9 compatible CAD program, Vectorworks.
Whether boot in OS 9, or run in Classic (most common) I have excellent 2D/3D performance with the 9800 Pro and the Geforce 6800.
As for games, most all games have an OS X update or counterpart, and that is the way to go.
I have not run into a graphics issue with any OS 9 game and the two cards which I use.
Also, is it both the 128 MB and 256 MB Radeon 9800 Pros that support Mac OS 9?
Except for the VRAM, the cards are identical. Either will function just fine in OS 9, and either will provide Core Image support for Tiger and Leopard.
There isn't a need to spend a lot more for the 256MB version, though.
Testing shows the cards to be equal, with the 128MB version actually being slightly faster in certain applications.
If shopping for a 9800 Pro, there are real Mac Editions, which run $200+, or there are flashed 9800s (converted PC cards). These flashed cards run around $90-$100, and offer performance identical to the
real card.