Vertical Mount 6800xt Red Devil might improved your GPU temp. By 6 Celsius (Tested in TimeSpy) Give it a try 😉 : r/Amd
Using a normal vertical bracket in my P500A significantly improved my GPU temperatures from stock (4°c average, 6°c peak) : r/Phanteks
Vertical GPU - Temperature - GPU - Level1Techs Forums
Amazon.com: EZDIY-FAB Vertical Graphics Card Holder Bracket Support with Multi-Angle,GPU Mount,Video Card VGA Support Kit with PCIE3.0 Riser Cable- Black : Electronics
vertical mounting gpu for better thermals? | Overclock.net
Fact-Check: CableMod's Vertical GPU Thermals vs. Stock Case | GamersNexus - Gaming PC Builds & Hardware Benchmarks
Bykski Vertical Gpu Water Block Mount Thermometer,temperature Display Lcd Screen Component,black,transparent,g1/4 ,b-vga-sc-fx - Fans & Cooling - AliExpress
Gigabyte finds a solution to vertical vs horizontal GPU dilemma - VideoCardz.com
Vertical GPU for everyone! CableMod Vertical PCI-e Bracket - YouTube