Here D3D runs much smoother than OGL.
[b]Optimization guidelines by Koji Ashida of NVIDIA:[/b][list][*]Use fx12 instructions whenever possible[*]Use lowest pixel shader version[/list][url=http://developer.nvidia.com/docs/IO/10878/ChinaJoy2004_OptimizationAndTools.pdf]source[/url]
[size=1]The politics are invading the technology. We don't really like to mess with politics because that kind of adversarial relationship has nothing to do with pure technical operations and the technical specifications of what we like to play with, the hardware![/size]