I cant take it anymore

I prefer xbox 360 to PC any day because it takes a lot of the pain out of gaming IMO...but I cant take not knowing how the story ends. The ending of ED is constantly wearing at me...like a book thats had the post climatic resolution torn asunder.
SO I give.
ok, my little rant is over, now my actual post:
I have an older (circa 2002 or so) PC connected to my hdtv that ive been using for 3D modeling and design (autocad and such). It's specifications are listed below as displayed in control panel:
WinXP media center edition, 250 Gb HDD
Pentium(R) D 3.00 Ghz
2.79 Ghz
3.24 Gb ram
Nvidea GeForce 9800GT
Will DNS install and perform decently on this machine? Will it be comparable that the performance of DNS on a xbox 360?