I need to put in an new hard drive and I'm getting different answers from different people. HP support sucks. I have an hp pavillion 533mhz computer(8660c)made around 1999. Hard drive went south. It was 20 gig. I would like to install at least an 80 gig maybe 120. Do I need a controller card for my bios to see that big of drive? I would like to just upgrade the bios but I don't know which upgrade to get and I've never done that so I don't want to screw it up. I think my bios is phoenix. Thanks.