Contact HP and see if they make a bios that will support a more modern cpu. if they do, then you have a shot at running it IF you're willing to buy a new cpu for that comp. you also need to see the power output by your power supply, it should be written on the side of the power supply that you can access by removing the cover, to see if you can put in a more modern graphics card, anything you could use would require a good bit of power to run more modern games...You're really much better off upgrading the entire system if you want to play modern games.
case and psu
total cost, 565.95+shipping (a lot of the items are free shipping, the estimate on shipping to me in PA was $10.00)
Thanks for looking this up for me! But looking through the Pros and cons secontion, it said on a few pieces that it cant handl heavy gameplay (I.E. "Cant handle Oblivion on medium settings.") Did you pick them cause they are the cheapest that function well for gaming, or are those people just being goofy?
Again, please dont take the question the wrong way, I really appritiate all of the help
Edit : Also, Shouldnt it need a Power supply? Or sound card...I didnt see either of those, Unless I can use the sound card from my old one. Idk bout the power supply, heres the spec for that : I just see it says Output : 250W Max