Reset your BIOS to defaults using the jumper, then reconfigure your drive priority and SATA ports as needed (e.g. to AHCI and/or RAID; whatever they need to be).
What is the brand and model (not just wattage) of your PSU? In fact, your full system specs would be helpful.
Gigabyte GA-Z77-D3H motherboard
ATI radeon HD 6950
Intel 3750k 3.4Ghz
8GB corsair vengeance RAM
500MB hitachi HDD
Thanks for all the replies.