It may be too late, but, I just thought id throw my info into this post.
I have no problems with Skyrim. I am able to run Ultra with all max settings, except AA 4x being optimal. I haven't even installed an app for benchmarking yet, cuz it runs great. I reinstalled the OS (Win7 x64) the week before Christmas since I knew my wife was buying me the game.
When installing I used the Install tips in the Guide by Chastity@ASUS and I am VERY grateful for the information.
http://rog.asus.com/forum/showthread.php?1150-G73-74-53-Series-Driver-and-Application-Reference&high...I found that the minimal install of bloatware made the system just that little bit more responsive than the feel of the original factory image. Hope this helps. THANKS CHAS!
BTW, I am on the G74SX-A1 not sure how the other versions are running but I absolutely love mine.
No performance issues what so ever, only complaint is the power connector and jack are, well, JACKED. I actually have begun to remove the battery and run without it, or windows constantly reports a dip below the Critical Battery level.
Good Luck!