Hello everybody. Can someone give me an advise. I just bought a new computer. The motherboard is ASUS p55800-MX. After installing all parts, I turn on the computer. The computer works great but it does not see both CD drives. After I change "slave to master", computer can see both CD drives but it cannot start because it doesn't see now both hard drives. I brought the computer to my friend who better understand computers. We sent three hours but the result is the same. If computer see hard drives, it doesn't see CD/DVD drives. Or, if it can see CD drives, it doesn't see hard drics. He tried everything but no result. Does anybody have any ideas? Thank you very much in advance.