I am building a new system, only part used is the power supply. My motherboard can't detect my hard drive. I tried switching cables but it only detects my dvd drive. Any assistance will be greatly appreciated.
You can try connecting the SATA cable to a different SATA port on the motherboard. If it still doesn't show it's most probably DOA. If you want to make absolutely sure about that test the HDD in a different system.
Hope that helps.