If you use the sata HDD, you need to go to the BIOS> Standard CMOS Features>Primary IDE Master/ Slave, Serial-ATA 0/1/2 Primary/ Secondary Channel, then set up the setting.
Your MB has NVIDIA chipset, maybe only have IDE or RAID, check the manual. If you use SSD you are better use the raid mode. For regular HDD either one is fine.
If it still doesn't work out, maybe the hard drive ( either SSD or HDD) has problem or the win7 disc has problem.