I got a tower as a gift from my mother, who doesnt know much about computers. Basically she bought me a best buy tower HP tower. Has an AMD e1-1200 APU and my sister bought me a powercolor hd 7750 for it since she knows I like gaming (generally console, new to PC). I believe the 7750 will fit, but from my understanding, the e1-1200 is basically the biggest piece of crap out there. It seems like this is mostly found in laptops making upgrading pretty much out of the question. In a tower, what can i replace this guy with?