First of all - one thing regarding the Datapath cards - they are definitely better, that's correct. But I am not sure that you can fit 2 Datapath capture cards (SDI2 and E2S for example) in the same machine - we couldnt fit E2S and RGBPRO since they are using the same driver and it's official info from Datapath.. haven't really tried with SDI & E2S... yet
An update - none of the above solved the problem
Processor with 40 lanes... direct SDI camera... sync into the Blackmagic...correct input settings... etc, etc.
But finally it will occur that Blackmagic does not work will all motherboards with same chipset from same manifacturer.
One more info we've received yesterday from their suppor regarding Ultrastudio 3.,0 Pro - the new USB 3.0 capture cards from the also do not work with many chipsets