Jaid_HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Video\ ( your driver video id) \0000\UMD
create LodAdj string set to 15 or 0 insnstant lod change no reboot, only close/open your game. LOD with lastest drivers ez. no soft, only for pro pc users. welcome to the regedit.
on ati lod 10 is hardware.
I can confirm that this actually works. I have a mobile AMD Radeon 7670M.
Although the path in regedit was a different one! Just use the search function (ctrl+f) in regedit to find the folder "UMD".
This is probably the easiest way so far, without any extra programs to install and stuff :D
It gave me at least a 20fps boost!