Re: Motherboard not recognising my HD
Just so i understand your situation better, does the new hard drive already have an OS? Are you trying to install the OS on it right now?
Usually if this is a new hard drive and you already have a running system, when you add the new drive you will have to go into disk management and format/partition the drive. If you still can't see it in windows you may have to use a 3rd party tool to format the drive.
If this is a brand new drive and no other drives have an OS on them, you'll need a boot disk (XP, Linux, Vista) to format the drive and partition in prior to installing the OS.
If you've tried either one of these (whichever fits you) and you can't even see the drive in the bios screen, look at having a bad hard drive, SATA controller, or SATA cable.
Give us a little more detail about your setup and what you are trying to do.