That is a high DPi. My mouse allows on the fly lowering of the dpi, can you do that on yours?
Also, do you have vsync (iPresentInterval) disabled at all?
Have you also tried disabling mouse acceleration?
iPresentInterval is disabled. Should I try enabling it?
Besides the DPI setting , have you checked and changed the Polling Rate? Check your mouse software. my G-3 has settings for Both.
Lol..I agree thats High...I thought my 2000 DPI was fast...dang..
My Polling rate is at 1 Ghz. I should probably mention that I've tried to lower my DPI without any results. My sensitivity is still crazy high compared to the one outside of menus.
Make sure the X360 controller option isn't ticked in Skyrim's options. If that wasn't it, try deleting the ini files (after backing them up) and launching the game to rebuild them - sometimes changes that worked with one patch version don't work with a newer game version.
I think its unticked, but I'll check again
You can try reducing the following settings in the SkyrimPrefs.ini file after getting a comfortable speed set for your desktop.
fMouseCursorSpeed=1.0000
fMouseHeadingSensitivity=0.0100
bMouseAcceleration=0
Mouseacceleration is already off, but I'll definately try the rest.