Remove all the hardware from your system. Leave only the CPU and cooler.
Now fit the VGA - only one if you are running multicard.
One hard drive the OS drive of course.
One stick of ram.
No other USB devices beside Keyboard and mouse.
Boot into BIOS
Set defaults.
F5 and enter, select your SATA mode then F10 and enter.
Do you have the error now?
If no then add one piece of hardware at a time until the error returns.
To help us help you - please provide as much information about your system and the problem as possible.