http://blogs.msdn.com/shawnhar/archive/2008/04/13/shawn-s-holistic-detective-agency.aspxOk, I admit it. I oversimplified , again . But this is the last time, I promise! To obtain maximum parallelism between different stages in a pipeline, you should ideally buffer up an entire frame of data in between each stage. This is exactly what happensenCommunityServer 2.1 SP1 (Build: 61025.2)