I have a PC running Windows 7 (64 bit) on an ASUS p5e3 delux mobo. My video card was a nice NVIDIA GeForce 8800 GT (ASUS) which died a week ago and had to be replaced. I decided to go for an ASUS NVIDIA GeForce GTX 660 Ti (after some rather vague technical advice) . Please note that the mobo has a pci-e 2.0 slot and the card runs on pci-e 3.0. The advice I received was that the card will run but on pci-e 2 speed, which was OK. I installed the card and booted the PC. My monitor came up with a "NO SIGNAL" indication. After a considerable amount of time the monitor turned on and Windows 7 booted normally, with one exception: the dvd drive had suddenly become "invisible". Note that the driver for this drive is loaded during the boot sequence. Other indications, like num lock on (which I had set to off), showed that something was changed in the boot sequence.From then on, I boot and teh same happens. Windows runs nicely on the new video card, everything is great, but no boot sequence and no dvd drive. Unfortunately, I cannot see the boot sequence to try and fix this, I cannot use the dvd drive to load anything, I cannot see my way out of this! Please help, I have no idea how to fix this.