Question Connecting AMD Vega to SONY TV disables UV/OC

Jan 19, 2020
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Vega56 Red Dragon running at P7:942MV / 1490-1520Mhz / 950Mhz Ram
Vega56 Red Dragon-> HDMI-> Samsung Syncmaster Display = FINE
Vega56 Red Dragon-> HDMI-> 4K TV Sony 55XE-8588 = Problem

The TV is being portrayed as "Sony TV *00" in the drivers, yet I can enable HDR support. Whenever I start a game or benchmark the GPU goes in auto mode regardless what I type into manual OC/UV. This means, that I am running at 1,05-1,1MV which results in terrible 1100-1250Mhz/700RAM giving me a drop in frames of about 20-30% along increased power consumption. Restarting the PC with the TV on is no different. There is only one HDMI cabel installed at a time, the one I plug off the Display and plugin to the TV so there is no multi monitor setup. Switching back to the Samsung Display returns all OC/UV.

Tested with
Adrenalin drivers 19x and 20.1.2
 
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