We are testing the new DVI Extender from BlackMagic as a DVI to SDI converter with a windows-based PC. The conversion works very with NVIDIA Graphical cards with any resolutions. However, when trying Integrated Intel Graphics controller (e.g. Intel GME965 with GMA X3100), the SDI signal is very bad and has a lot of glitchs. We tried many resolutions (1080 and 720 with 25Hz, 30hz, 59.9 and 60 Hz).
Any idea about the source of this problem ? or may be there is some incompatibilities with Intel GMA cards ?