Disable Vsync
Access the SkyrimPrefs.ini again and add iPresentInterval=0 to the bottom of the [Display] section. This can improve a sluggish framerate and eliminate instances of mouse lag. Thanks to Tweak Guides for this one.
Bur then, in another forum where this fix was cited (among other tweaks), I read "Oh no, messing with the ini files disabled my achievements...".
Can someone please confirm me this?
Because this dll http://www.megaupload.com/?d=ICEDIU66 fixed the Crossfire performance issue (just put it in the Skyrim main folder) but I can't go beyond 60 FPS, either indoors or outside (I'm stuck at 60 FPS, actually).
Thanks in advance.