I reput my hardware section message because the problem can be due to driver .
There is always the bug with 7900 XTX with my 2nd 1080p monitor .7900 XTX display on this 2nd monitor in half in vertical , so in 540 x 1920 whatever connection wires ( DP or hdmi on my 1st or 2 nd monitor ) .
Said that, recently I had my PC crash when i was in game , sudden supply cut and must to unplug and replug the wire to restart my PC . Usually , when my computer crashes , it is due to DDR4 parameters but with DDR defaults parameters it crashed again .
When i return to desktop windows there is the message as " wattman default restored due to an unexpected error " .
That occured several times so much so that i opened my tower and see that the 7900 XTX was hot and the chipset heater was hot too .
What i didnt pay attention, is that i put the 2nd monitor to the 7900 XTX despite the bug of display .
I am not sure of that but i think that 2 monitors makes wattman bugging and makes 7900 XTX crash when in game , increasing too high the supply power .
After that i observed the 7900 XTX and saw that the 3 fans suxx the air by the top and put it in 7900 heater SO it is important that you PC tower has good fans that eject the hot air out of the tower , put in 7900 heater line if possible . Of course a good flow of air entering and exiting , always in line of the 7900 heater is better . It is obvious but that depends on tower configuration .
Before i looked that , i had the air entered by fans instead of ejected . The gain in game is that junction T° lowers from 90 °C to 82°C in average
Remark : we can see where the air goes from a fan seeing the hollow or not side of the fan . If it is at the hollow side , the air is ejected , aspired in other side .
