I just installed an Intensity Pro in my Acer M3800 quad machine running Windows 7 64 bit with 8GB ram. After downloading the latest drivers/software, there was a firmware update. Everything seemed to run smooth but when I played a project from my PP CS3, only audio was present on my LCD TV (no video). The TV is not displaying error messages ('No signal' etc.) and as I said, there is audio. The cable in use is good quality.
A response from the Blackmagic support team didn't answer my question but did serve to make me think of the solution.
Since I was just looking for monitoring usage of the card, I disregarded the instructions to start a new project using a Blackmagic preset in Premiere since all this seemed to refer only to capturing. I was simply loading one of my existing projects and looking for output to my LCD screen (no video).
It occurred to me to start a new project and import an existing one into it. Worked first time :-)