BIOS issue

I recently installed a new mobo and cpu, and reinstalled windows.

I accessed the bios settings and put my hard drive as the 1st boot device, when it resets, the computer works fine. But when I shut down my computer and restart it up, the BIOS can't find the hard drive and I get the screen saying select boot device then restart. So I did that and when I shut it down and restart it says the same thing.....

Make sure the mobo battery is properly seated.

Wouldn't hurt to double check which SATA post the drive is plugged into. The ports should be marked - select the #1 port.

I did both of what you said and I still have the problem. I tried a windows 7 repair, and that didn't work either.

Try to check the BIOS setting, or reinstall your BIOS

I checked everything over and reinstalled the bios, I even made sure I had the up to date drivers and still having the same problem....

I was reading something about 6GB sata and how it might need its own driver, but couldn't find a 6GB sata driver, I don't know if thats the problem or not. My new mobo has the 6GB sata.

Here is my mobo:

Biostar A880GZ ver. 6.x