I bought a mobo/cpu from a reliable seller here along with 8 gigs new Ram. I am using an existing Sata HD that worked from a previous build and a XFX vid card. The only other installed device is a DVD burner. I installed a Win 7 CD to do a clean install, it installs the files and when it comes to the area where to install the OS it says it cant find the HD. Ive checked out the bios settings, boot sequence, etc and can not find out why this is happening. I also have an Antec 550W PS installed. Normally these are quite simple as I have build many pc's but nothing like this. Any help appreciated. Thanks