BSOD after installing new cpu fan??

i havent changed the sata port at all, shouldnt be that, its just i turned it off as a boot option in the bios and i cant find the option to get it recognised and turned on again. nothing recognises any more but it was working fine before. it has power and data, and i can open and close the drive, and it even tries to read a disc even though the computer wont. i need an expert on this particular asus bios

btw i havent had any bsods or any other problems since i swapped the ram into the other two slots on the mobo in the 12 or so hours i have been using it

don't have that handy, probably lost years ago, also cant find anything online about it, someone here must know this bios well enough to help?

yes but nowhere describes my problem

yes it didn't help, doesn't mention anything about bios suddenly not recognising hardware and refusing to add to it back on to the boot option. i thought i knew how to use my bios, but clearly something is wrong here, its not a hardware issue either