Should be enough to max in-game settings and add some AA on top. Maybe 4xMSAA will be ok. If you are really considering upgrading something, go for a SSD to greatly shorten load times. If you're postin just to kill time until the game is released... sorry, three days to go =)
The 4100 tested with a Radeon 6950 .
None of the games are as graphically intensive as Skyrim .
Also be aware that monitors refresh at 60 Hz , which is the same as 60 frames per second so anything above 60FPS never actually appears on the screen. There is NO advantage in building a 150 fps monster except bragging rights and a lighter wallet .
I believe you will be able to play Skyrim on very high settings and get good frame rates with your build . I think if you want ultra setting and frame rates that never drop below 60 fps you need to spend hundreds of dollars more on a more powerful processor and a second graphics card .