elitecommando57

Thanks guys for all your replies. I reset the BIOS and it worked. Thank you

Hi, I built my first PC a few months ago and it all went fine but now I am building a PC for my brother but I have problem. The PC was working fine with an M.2 SSD then I added a SATA SSD and still fine but when I went to add 2 HDD's in RAID 1 it completly stopped detecting the M.2. I have tried switching SATA controller modes back to AHCI I have tried disconnecting the other 3 devices but nothing seems to work the SATA SSD and the 2 HDDS work fine but I cant get into windows as that was on the M.2 which stopped working. I would appreciate any help. Thank you I CAN GET INTO BIOS BUT THE M.2 ISNT DETECTED SPECS: ASUS X99 STRIX MOBO I7 6800K 2 X WD BLACK 2TB HDDS 1 X SAMSUNG 950 PRO 256GB M.2 1 X SAMSUNG 850 PRO 512GB SSD ASUS STRIX OC 1070 32GB x CORSAIR DDR4 VENGANCE 3000 CORSAIR HX850I