Solved!!!This drove me nuts! I decided I couldn´t wait for 10.5.2 and installed the video kexts from 10.5.2 (find them at http://scottdangel.com/blog/?p=18). After reboot, the card was unaudible!! BTW, no differences in speed... and nothing crashes.Hope it works for you.P.S: I have attached the installer. Use default if 256 mb RAM, else select customize in the installer.Obviously the attachment did not post correctly.It was too heavy for a single attachment. Still, you can get it in the linked site in my previous post.