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Two months on and despite trying almost every combination of uninstall, re-install of both PD, the graphics cardand following helpful advice offered here, I've never got this to work again.
I've raises a support ticket - CS002331174,
I can totally relate, it my view this feature was a half completed effort that really maybe was just a focus on perhaps the laptop market but has implications for any desktop too and the plethora of configurations maybe not properly vetted.
I've run with simultaneous AMD and NVideo GPU's and see one set of anomalies
I've run with two simultaneous Nvidia GPU and see another set of anomalies
I've run with two AMD GPU's and see another set of anomalies
I helped a recent user that had a issue very similar to yours, a blank and unselectable fast rendering technology box like you show. In a nut shell the end approach that worked was:
1) Use DDU and remove all traces of installed GPU's. He had several and several brands. Not only discrete but CPU based too.
2) Get GPU functional with just VGA drivers, don't let windows beat you to installing a driver
3) Make sure BIOS set appropriately for specific PCI first slot of GPU and any CPU specific GPU disabled and monitor only plugged into discrete GPU
4) Load GPU specific drivers
5) I've launched PD periodically in these steps to see what it has for hardware encoding, what the about box indicates and so on of confirmation of config vs PD capability shown.
Approach probably not something I'd suggest to the typical PD user that is struggling. In the end, I had a Nvidia working system for him. I can only think the issue was from multiple GPU's once installed in his system and inadequate full uninstalls of all pertinent stuff. Nvidia, AMD, nor windows alone achieve that.
Hopefully CL will resolve with your ticket.
Jeff