> > Otherwise, I would suggest: > > 1. Remove ATTO SCSI card. > 2. Move Radeon card to different PCI socket. > 3. Remove hub from connection. > 4. Change connection socket of hub. > 5. Re-arrange all PCI cards. > 6. Try Radeon card in different Mac. > Well i've tried removing all cards and we have drive activity. When we insert the Radeon card alone it has no drive activity. As to the 3 PCI slots being supported it's because the XLR8 upgrade card was 6 Slot Edition. The Sonnet upgrade doesn't support all six slots. (Or that's at least what they say) I've tried the Radeon in my PowerMac7200 upgraded with a Sonnet G4 upgrade card and everything works great. Nothing adds up. Right now the XClaim 3DPro works great but is only 8MB of VRAM. CJ