im running a hp home media center m8530f it has AMD Phenom(tm) 9550 Quad-Core Processor, 2200 Mhz, 4 Core(s), 4 Logical Processor(s), and a nvidia 9300 ge, i got like 100 bucks to spend on a new graphics card any ideas on what would be best? and then i was also told that i need a new processor, do i need a whole new computer or is there a way to fix it with the tower i have?