I have a P35C-DS3R mobo, BIOS ver F11. All running quite happily.\nI had changed my Video card from an NVIDIA card to one of the latest\nRadeon cards. I'm happy with the performance boost of the card.\n\nAs this new card is bigger than the old one I've had to change some of\nthe SATA cables. This mobo has 2 SATA controllers. One Intel and the\nother Gigabyte. Previously the Pioneer DVD-RW 216 was attached to the\nGigabyte controller, and my 2 HD's to the Intel controller.\n\nAfter the change of cards, I had moved all SATA cables to the Intel\ncontroller. I was happy with it. Everything appeared to work under\nWindows and Linux. Including the DVD.\n\nJust yesterday I was going to update my Linux installation. I put the\nDVD into the DVD reader, and booted the PC. I was expecting the PC to\nboot from the DVD but it carried on and booted from the HD. So I went\ninto the BIOS settings expecting that the boot order had been changed,\nbut NO. The Pioneer DVD was the first in line then the HD. Hmm! maybe\nthe DVD disk was not a boot disk, so I tried to boot from my Vista disk.\nStill no go!\n\nI'm going to have a play today (as it is a public holiday where I live)\nto see if I can find out what is going on here! I'm going to try\nstretching the DVD SATA cables around the Video card and put it back\ninto the Gigabyte controller. And also try booting from a USB DVD drive.\n\nI will post my results, however has anyone every heard of this behaviour?