[mkohman]

 For responsiveness, you want to set the desktop to 60hz. You could set it to 23hz, but Kodi will be very laggy. It could also be that refresh rates changes are causing this problem, but I wouldn't give it up until I had to. Changing refresh rates from 60hz and back again is normal for a HTPC. You can't choose 10-bits at 60hz because HDMI 2.0 doesn't support this spec. But you can choose 10-bits at 23hz (or 10-bits at 30hz for that matter).

I don't know what your gamma is, but I can guess it is 2.40. This is only important when doing HDR -> SDR conversions.

Don't know anything about the power supply. Your GPU seems to be performing alright.   

Thank you so much. I will keep it at 60 hz as you say and will briefly change to 23 and 24 hz and set it at 10bit.. If you look at my previous pictures, the JVC info section is showing it at 12Bit , isn't that better? MadVR option is 10bit or above. Would appreciate if you could advise .. thanks..

Also I don't do any HDR to SDR conversion as my projector is HDR and does HDR with MadVR , should I still select the "this display is calibrated" and choose BT2020.? What will this do? Thank you   

 It doesn't matter what madVR reports. It matters what the GPU sends to the display. madVR doesn't know this information. This should be 10-bits. I don't know why your projector says 12-bits, as that is not possible with AMD. Check the output at 23hz. It should be 10-bits.

You want to use this display is already calibrated to select the correct gamut. The gamma value is ignored, so don't worry about it. The gamma is only relevant if you are doing HDR -> SDR conversion. Otherwise, it does nothing. But the choice of gamut will do something. Changing the gamut will cause madVR to convert all BT.709 content to BT.2020 before output. Otherwise, madVR will output BT.709 if calibration controls are disabled, as this is the defaut. 

Thank you for your help , always appreciated AMD does support 12bit I have seen it before but not at RGB 4:4:4 FULL  @ 60hz.. I will check the output at 23hz and select 10bits but if it does have 12 bits should I select that or still 10 bits? Thank you.