I apologize in advance for the mistakes I'll make, being not english. Recently, while I was playing a game, windows crashed into a BSOD and rebooted, giving me the "reboot and select proper boot device or insert boot media in selected boot device and press a key" error. If I reboot the pc after this error and go to the bios, I see NONE of the sata drives (which are three hard drives and two dvd drives), even if I hear them spin (I could be wrong but when I touch one of the hard drives it gives a slight vibration). The bios does, however, recognize everything else, like my external usb hard drive, the RAM and so on. I tried to reseat the cables, both on the drives and on the mobo, but no luck. Then I discovered that, occasionally, when I leave the pc shut down for a while and then power it on again it will recognize all of my sata drives. In these cases, if I go to the bios I can see all of them properly recognized. This, however, only lasts a few moment, since when I exit the bios the computer will freeze into a black screen. A very few times I was also able to go into windows 8 recovery menu, but even in that case, nothing will have any sort of effect. Just for the saying, I swapped the sata cables and probably changed the order they were connected. I don't really know what to think, but probably the sata ports are where the problem is (or maybe the psu?)...what do you think the problem is?