I have an E6600
[email protected], 4G mem, GTX280, 5040x1050, WinXP (just for comparison.)
I play windowed/maximized, but with a chopped viewport - see the other WoW thread for the pic I posted there. the changed viewport doesn't make much difference in framerates. I generally get low 20's in busy city areas and 50+ everywhere else.
here's my settings
Resolution tab:
Multisampling: 24-bit color 24-bit depth 8x multisample (amazingly this seems to have very little impact on framerates)
Use UI Scale, Hardware Cursor, Windowed Mode, Maximized, Disable Resize are all checked, the rest are not.
Effects tab:
View Distance is three notches from the right
Env Detail is 2 from right
Tex Res, Ter Det, Grnd Clutter Density, Tex Filter are all low
Spell Detail is in the middle
Grnd Clutter Radius is low
Weather Intensity is one from the left
Shadow Quality is low -- THIS IS THE BIG ONE - they enabled dynamic shadows in LK, apparently for everything - creatures, buildings, etc, they kill my framerate if this is up much at all.
All three checkboxes are enabled.
Hope that helps... good luck