I have a Mac PRO 1.1 running El Capitain. I have a bootcamp partition with Win 7 Ultimate on the same SSD as El capitain. I have a Samsung 850 EVO disc I have 3 other normal drives with various stuff on. After som swapping around (adding and removing) with the drives in my machine for a while putting the SSD in another slot and so on my mac partition will boot but the windows partition will not. It gives the dreaded: "No bootable device -- insert boot disk and press any key" I have also another graphics card, and that is original for my Mac. And that card was also swapped in and out during the same time. Now i am back to where it used to run. Same graphics, same ssd, and everything else is out. Strange thing is that the windows partition have not been booted during this period with swapping around the drives or graphics cards, but still now it will not boot. I tried zapping PRAM and choosing the bootcamp as boot partition in the system preferences. And that still does not work. How can i get my mac to boot on the Win7 partition again? Its a real hassle to set up a Win7 installation so i would rather avoid doing that. Anyone got some nice clues?