Champions!!! Thanks heaps.

FYI for others this is the top part of my working ini file

[Renderer]
D3DFullScreen = false
Height = 1080
NativeHeight = 1080
NativeWidth = 1920
TextureAnisotropy = 16
Width = 1920
WindowX = 0
WindowY = 0
AllowDepthOfField = false
MeshLODQuality = 1
doShadows = false
doBlobShadows = false
FarClipScale = 1.
FullScreen = false
VerticalSyncState = false

I have shadows turned off btw and running 1920x1080