I have an older Inspiron 531 and I wasn't planning on replacing it anytime soon as it plays all the games and does everything else I need. I was wondering if there is a way to boost its speed and power a little more though. Right now I can play most mmo's on med settings, but I wanted to get a little more out of it. Currently I have a Athlon 64 X2 4400+ (http://www.newegg.com/Product/Product.aspx?Item=N82E16819103546) processor in the PC. I have an AMD Phenom X4 9150e (http://www.geeks.com/details.asp?invtid=HD9150ODJ4BGH-R) sitting around right now, my question is, can I replace the 4400+ with the 9150e and is the Phenom faster?