I'm upgrading my pc using components from my friend's pc - New (to me) Mobo (Asus Av8 dlx), processor - Athlon 3500xp+, 2 gig ram in 4 x 512mb, 450w power supply. Using my sound card (SB Audigy), and graphics card - ATI X800 GTO. (agp). The problem is that although I know I've connected everything...