What do you think about my gaming machine?

IMO its a pretty decent computer but I recommend getting at least a 600 watt psu so that you have enough power for your card and your computer most cards these days require 375-450 watts to run so the 500 watt seems kind of low and if it were my computer I would upgrade to 4 gigs of ram so nothing would slow me down but other than those like I said it is pretty decent