yo @bReakdowN
I have a problem similar to yours with:
Average temperature rx 6900xt in 70c games (2000RPM)
cpu: i9 9900kf Average temperature in 60c games
Motherboard: ASUS TUF Z390 gaming with WIFI
2t ssd NVMe (all games are installed)
480 g ssd (for windows)
16x2 ram 3000mhz cl 16
Windows 11 64 bit
PSU 800w Radeon Software Adrenaline 21.12.1
2k monitor (2560x1440p) 165Hz DP port
After a few checks, I realized that old games do not use all the power of the graphics card, for example, I use only 30% of my graphics card in the left4Dead 2 game.
New generation graphics cards only seem to achieve 90% performance with the DX12 and Vulkan alone.
For example, in cyberpunk 2077 and my graphics card control is used to 99%.
for fix :Try to increase the resolution scale in the game.
You can also visit this link that I and @Geforsikus_2021 other people discussed :
https://community.amd.com/t5/graphics/6900xt-not-100-use-at-all-games-just-using-70/m-p/492632#M7995...
best regards - from iran