Dear zuz242 , rumar4u,

Thanks for the information.

My Configuration is

Motherboard : Intel Corporation D975XBX2
BIOS : i975 (with updated bios BX97520J.86A.2838 of 9/3/2008)
Sound : Intel 82801G
SigmaTel 9227 audio codec
SigmaTel 9274D audio codec
Lan Card : Intel 82573E/82573L Gigabit Ethernet Controller
IEEE-1394a
Serial ATA Controller : Marvell 88SE6145 Serial ATA
Processor : Intel Core 2 Quad Q6600 @ 2.40GHz
Memory : Corsair XMS2 DDR2 PC2-6400 (400Mhz) (4GB Duel channel)
Graphic Card : XFX nVidia 8600GT 256mb DDR3

And I am using Mac OS X 10.6.8 (updated from 10.6.3).

I have the same issue with the Graphic card. I hope it may help me, so today I will try, if could not solve again I will request you for the details.

With regards
Dnld