My bios isnt seeing all 500GB. It is only seeing 137 GB, which is from what I hear, the norm. I am running SP3. Its a new build, my only one with a HDD bigger than 120 GB so I have never run into this issue before. I have the latest BIOS for my mobo. Im running an ASUS P5Qc. I am also running the latest atapi.sys ver. so im kinda confused on the problem.