Technical [3.3.5] cant force the game to run in dx11

[420gg]

so im running on wotlk 3.3.5a and im not really satisfied with the current fps so ive read about people having better performance with the dx11 feature (around 2010-2011 threads),
my problem's that i cant force the game to run in dx11 at all - launch options (-d3d11, administrator, compatibility mode), config.wtf (set gxApi "D3D11" / set gxApi "d3d11"), adding set gxApi "D3D11" to account-specific and character-specific .wtf files, disabling ambient occlusion in nvidia control panel globally and it still reports that im running directx9 (/run print("gxApi: ", GetCVar("gxApi")) dumps D3D9 as active).

meanwhile, in dxdiag it says that the current directx version is 12 (dxdiag dump: https://pastebin.com/raw/ZQwvy6ZB) and ive tried updating directx via microsofts web installer but it says that i already have the newest version installed.
however, on mop i can use the directx 11 feature without any problems

im running nvidia's 376.53 drivers on a 750ti

[Nightwalkerz]

the wotlk client doesnt support dx11