Really appreciate your great answer here Derupter.
And before we get to this question, are you saying there are three independent bit depths going on here?
1) bit depth of DAC
2) bit depth of digital input
3) bit depth of digital output
Either way, my hunch is that digital output being set to 8 bits would still allow 10 bit LUT. But this is based on my speculative understanding of how things work.
If anyone has any adapters they want tested for LUT bit depth, feel free to PM me. Alternatively, if anyone has a colorimeter and a DAC they want to test for bit depth, I can provide instructions on how to do so.
By digital input i mean the input of the adapter which is the digital output of the graphic card
By digital output i mean what exit from the graphic card and what you set on graphic options
Digital receivers of these adapters usually pass the signal as it is,if the DAC is 8 bit the receiver trims the lower 2 bits (in case of 10 bit input)
From what i understood to preserve all the informations of the custom LUT you need to set the digital output of the graphic card to 10 bit, but i don't know much about these things
The downside of this is that you lose bandwidth on the digital part,in this case the only chip with enough bandwidth for 10 bit is the Lontium LT8612UX,the ITE IT6562 can do max 288 MHz