I have got Watchout 5.5 and recently purchased a Datapath VisionRGB-E2S, to add to the existing blackmagicdesign decklink studio card.
However since installing the datapath card windows no longer sees the blackmagic.
Anyone got any suggestions as to how I can fix this?
It is possible to get those cards to co-exist with the right combination of motherboard, BIOS, driver versions.
I agree with Jonas, I would be looking at interactions of the PCIe expansion slots and then look at the software side.
We have seen x4 rated slots drop to x1 when another expansion card is added to a nearby slot.