I currently have a AMD phenom ii x2 555, but my computer lately has been going very slow at opening up things and is just slow in general (but once the game is open the game is smooth). ive been wanting a new cpu for a while mainly because he person i bought my computer from did a horrible job with the thermal paste and im really worried its going to get onto my motherboard and ruin my computer. i was just wondering if the AMD athlon ii x3 450 is a step up.