You cannot post a link to a file that is actually only on your PC ( :///C:/Program%20Files%20(x86)/Belarc/Advisor/System/tmp/(Luke-PC).html)
You are looking to upgrade,you currently have a rather old and poor mobo (Abit) and an old socket 775 CPU, I really think that you should probably wait until you can afford a new one or build it yourself. Perhaps just get a motherboard with an Intel CPU perhaps a new GPU and case. You have a power supply and hardrive, though if it is the old IDE connection then you will probably need to move to the newer Sata connections. You do really need to mention your budget is you are looking to upgrade and also, what is the main use of the PC?
By the way if you are not a major gamer then there is nothing wrong with your current graphics card.