Is this the device you have?
HDMI to 4K/UltraHD-SDI
I would contact AJA to see if they know of any problems with the output from the GTX Titan X. There are two different Titan X, the original had a Maxwell processor and the newer one has Pascal processor, so make sure you know which one you have. It may not be a Premiere problem
Another though! Have you checked that you have the newest HD specification cables, I just saw some newest HDMI even rated up to 18.2 Gbps
How long is the HDMI cable?
Yes the HA5-4K...HDMI to 4K/UHD SDI converter.
HDMI cable is short, 3ft I think. Not sure on the rating.
I'll check with AjA on the Titan version...good point. I'll need to get to the studio where the install is to pull more hardware specs.
Have you solved the problem with the AJA HA5-4K? What was the problem?