If thats your spec on your profile, getting any one of these cards would be a waste of time for you, and for quite a few reasons.... #1. your PSU wouldnt be able to run it -- and you dont have money for a new card as you say so i dont think you'd be able to afford a new PSU to power it unless you buy into a cheap one, which would probably blow up and fry everything once you put it in. #2. Generally speaking, your machine isnt so great. and the CPU is already bottlenecked by the 400Mhz ram and putting a 7970 or 7870 wont help even if you did manage to find money for a decent power supply. #3. you run a 17" CRT screen that most likely only has a VGA connection. you would need to get a VGA to DVI adaptor to get the card working as most mid to high range GPUs stopped coming with VGA ports a long time ago, Long story short... even if you won you wont be able to get the most out of either the graphic cards let alone be able to use them. If you win, I suggest you sell it and use the money to buy some more suitable upgrades for your system. Faster RAM, Faster CPU, Better PSU and probably a decent low-mid range GPU similar to that of a 5770 to tare games up at your resolution. you could do all this and still have quite a lot of money left over.