what i changed:
-Game settings
1024x768 resolution
texture quality - medium
radial blur quality - low
shadow detail - low
decal quantity - medium
antialiasing OFF
Anisotropic filtering OFF
draw distances dropped to about 1/3 across the bars
-Skyrimprefs (found in documents/my games/skyrim)
[Imagespace]
bDoDepthOfField=0
iRadialBlurLevel=0
[Display]
iMaxAnisotropy=0
iPresentInterval=0
bMouseAcceleration=0
[BlurShaderHDR]
bDoHighDynamicRange=0 (just found this, havent actually tried it yet but it should help)
[BlurShader]
bUseBlurShader=0
-Skyrim.ini (found in documents/my games/skyrim)
[Display]
iPresentInterval=0
[Papyrus]
iMinMemoryPageSize=100000
iMaxMemoryPageSize=5000000
iMaxAllocatedMemoryBytes=1800000000 (dont change this line)
im also using this mod that lets skyrim use more memory:
http://www.skyrimnexus.com/downloads/file.php?id=202#content
im a complete noob at this stuff but i thought it might help some people. im getting fluid framerates everywhere, even cities dont lag at all!
again, this is for people willing to sacrifice quality to gain performance. for me it has got rid of all mouse lag and increased fps. the stutter issue seems to have reduced also