Usually when a big anticipated game comes out I get everything I can to have it on "Ultra" settings. But I really have no clue what makes a big difference, so I will list my Specs and tell me what I will upgrade. I have set a 500 dollar limit for myself on this. I am upgrading for Skyrim.
Windows 7 64 bit Ultimate
Intel core 2 cpu 6700 @ 2.66GHZ (Overclocked to 2.7, I could barely overclock this thing sadly)
6144MB ram (6 gigs of ram)
Gigabyte GA-P35-DS3L Core2
ATI Radeon HD 5700
I also need a new Monitor which would be nice since Im currently using a TV. I am willing to upgrade my Motherboard.