Intel Xeon Quad Core 2.66GHZ, 8GB ram, windows 7 64 bit. Quadro 4000 2GB ram driver 296.88.
Forgive me for the fps metric, was in a hurry.
1.2ms is for a relatively small number of instances versus the number I'm actually going to be required to render. Also, consider that this is just for a single pass, whereas I need to also render into the second eye of a stereo pair, and into 4 csm splits. There's also a picture-in-picture second view, albeit without shadow maps.