I use it, i have win 7
RenderDevice.Dx11Enable 0
RenderDevice.Dx11Dot1Enable 0
RenderDevice.Dx11Dot1RuntimeEnable 0
RenderDevice.TripleBufferingEnable 0
RenderDevice.RenderAheadLimit 0
WorldRender.TransparencyShadowmapsEnable 0
WorldRender.MotionBlurEnable 0
WorldRender.MotionBlurForceOn 0
WorldRender.MotionBlurFixedShutterTime 0
WorldRender.MotionBlurMax 0
WorldRender.MotionBlurQuality 0
WorldRender.MotionBlurMaxSampleCount 0
WorldRender.SpotLightShadowmapEnable 0
WorldRender.SpotLightShadowmapResolution 256
WorldRender.LightTileCsPathEnable 0
RenderDevice.ForceRenderAheadLimit 0
PostProcess.DynamicAOEnable 0
PostProcess.DynamicAOMethod 0
PerfOverlay.DrawFps 1
GameTime.MaxVariableFps 200