Quick Question

I am VERY tight on money, and wish to play Skyrim on high or ultra settings...or play Skyrim at all, honestly.


How can I play Skyrim on high settings for the cheapest/cheap amount of money? I bought my computer for 900$ 3 years ago and it can barely play Minecraft without having issues. 

buy a 4870 for 40 bucks buy a core2quad or duo for 40 bucks buy some ddr2 800 memory psu mobo and you have a fairly powerfull pc that can easy play bf3 on medium. and you stay below 160 bucks how is that for a cheap deal? (ofcourse not new components)