I was able to get the HD5450 working, even with the sound but...

- I was unable to get the DXVA working. Everytime I tried I got a green picture and the application crashed (tried with ffdshow DXVA and flash). I allready had the driver up to date (11.5 & 11.6)

- TV through 7MC did not work, because it makes use of DXVA.

- TV Tuner (Nova-T) nearly worked. It detected some channel (108 on the first time, 92 on the second time instead of the 130 channels), but I was unable to get any picture because of the DXVA bug (sound was fine though).

- Some time the picture flickered and the colors got inverted for a while. It may be related to my cheap cable