Sorry if this has already been answered (I looked, I swear) or if I am asking an obvious question but does the Blackmagic Intensity card accelerate editing performance (a la the Matrox RT.X2) or simply just provide an HDMI output while editing? (Note, footage will already have been captured via Firewire from camera and not thru HDMI via Blackmagic card)

Thanks,
-- Artman009