I have a 2004 Gateway 510X with 512mb ram, 250 watt psu, P4 2.6 ghz cpu, GeForce 5200 fx 128 mb graphics card, and an 80 gb hard drive. What all should I upgrade to make it able to play games? ie Killing Floor, Command and Conquer 3 (without the game lagging so much as to be unplayable) and Minecraft. I don't have a lot of money, but I'd like to upgrade this pc just a little so that it will last a few more years at least. I want to keep any upgrades between $50 - $300. Any advice besides the "Get a DIY PC and build a new computer" comment I got elsewhere.