Hi fellow mac users,

i recently bought new hardware for an intel based setup, the gfx card remained the same (Sapphire RadeonHD 2600XT, 256mb, ID: 2588).

I used Zephyroth's 10.5.2 AMD EFI-DVD, everything went smooth. It ran fast under 10.5.6 without trouble.

Since the hardware is too new for that dvd, I used iPC (the duallayer version). Everything went fine, except for the graphics.

I used the drivers and frameworks that came with iPC; Photoshop was extremly slow, windowserver process used 90% cpu. And Quicksilver, when started, didn't show that squirly QS logo, only a white block becoming transparent. If no kext's are loaded (i.e. in safe mode), everything is fine, no hardware acceleration, though.

I tried many different drivers (natit's, efi-string, various installers) and frameworks (from the 10.5.2 zephyroth, from 10.5.6 original update, from the new XxX 10.5.6 installer, from 10.5.5), it makes no difference. Maybe a bios setting is wrong? PCIe voltage, frequency or something like that?

Actually, if I use OpenGLViewer, every test (except for the version 3.0) are fine and runs with good performance.

I haven't tested another "distro" yet (just installed their kext's and opengl-frameworks, but I guess if there's a problem with gfx, the only issues can be the driver itself and the openGL.Framework that is in use. Right? =)

Any Help will be greatly appreciated.

Oh, here's my config:

OSX: iPC 10.5.6 DL-Release
Mainboard: Gigabyte GA-EP45-DS3L
CPU: [email protected]
Ram: OCZ PC1066 4GB
GPU: Radeon 2600XT 256mb
Harddrive: 250GB Samsung (SATA)