Message: hi im new to this comp thing and i have a few questions about my tower. im looking to upgrade my tower and i have noticed that i have a sis6326 agp in my tower and i know its a grafics card. but the thing is that it comes out of the comp and its not bonded to the mother board. and im sure that its a sis 6326 agp card. this is what my system is 384 mb 400 mhz 250 power supply windows xp i just need a all around new tower and i need someone to tell me what i need in general. and if i got a new grafics card would it have to have the same as the sis 6326 agp so it would fir in the tower? any help would be wonderful thanks katie