Ed, not sure i follow. From what I've learned this is the I/o card I've always had and before mobo switch it was fine. It is hooked up exactly the same prior the swap. New issues, not sure of importance are: tower only turns on by powering it, not off of master on/off. Once going it goes fine through boot then goes black. W windows key I can get the error listed above about the usbui.dll missing from CDROM. Cancel that and then it goes to the shot above about usbios. Stuck here.