I don't understand why only 3 slots are supported but what I would try is removing all the usb devices you can esp a hub and try that. Also, might try resetting the 'cuda switch an zap the pram. I have a Power Tower Pro with a G3 card in it. How much did you pay for the G4 card? Is is really worth it? on 12/7/02 6:56 AM, CJ Scaminaci at anubisman at appleisp.net wrote: > I have a Power Mac 9500 with a Sonnet G4 450Mhz upgrade card. 768MB of > memory. Also I use XpostFacto and have Jaguar running. This machine has > 6 PCI slots but only 3 are supported. So I have a Belkin USB card and > an ATTO SCSI card with a Radeon 7000 Mac Edition. My Radeon has been > working great for about 3 months and all of a sudden the machine > refuses to boot. But when I put my old 8MB XClaim3D Pro in and take the > Radeon card out the machine boots perfectly. ATI has been giving me > form letters. I think it might be a hardware failure. Or an interaction > with any of the other cards? Any ideas?