d_gpuSync = 1, - used in pair waitForGpuMode seems to improve game responsiveness.
waitForGpuMode = 1, - used in pair with d_gpuSync seems to improve game responsiveness.
checkWorldPositions = 1, - not well researched, purely experimental.
dxDetect = 1, - installed DirectX detection
enableMobilitySupport = 0, - seems to disable functionality, pertaining to notebook power consumption optimization, should improve performance
usePhysHW = 1, - enables hardware PhysX(which, for me at least, is pretty stable). Will, perhaps, not work for non-Nvidia adapters.
detail_physx = 0, - switches off software PhysX(which appears no be unstable sometimes)