Performance VideoDeviceOut and BlackMagic SDI

I work mostly in Theatre and for as a VJ and bring mostly my own equipment. At the moment I use a vide variety of extenders/connectors (Fibre, Cat, VGA) to get the signal to the mostly far away projectors.
I am thinking about using a BlackMagic DuoCard in combination with their SDI to HDMI conversters to decrease the hussle/setup.
So my question now is: How is the performance using the VideoDeviceOut TOP with all 4 outputs of the DUO in use with also at least one additional SDI Input for live camera in use. Noticable latency? When also using the HAP-Codec It may put alot of stress on the PCI-E lanes. Any Issues there?

Hope for some insight and experience :slight_smile:

Did you end up trying this? How did it go?
Interested to work out the lowest-latency way to get cameras in & out of Touch Designer.