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https://pastebin.com/xsFn585X

-high -tickrate 128 +fps_max 400 -novid -r_emulate_gl -limitvsconst -forcenovsync -softparticlesdefaultoff +mat_queue_mode 2 +r_dynamic 0 +exec arcade +exec autoexec -allow_third_party_software +cl_updaterate 128 +cl_cmdrate 128 -no-browser

+cl_updaterate 128 +cl_cmdrate 128 -high -nothreadedsockets -allow_third_party_software +exec autoexec -novid -tickrate 128 +fps_max 400 -nojoy -high -fullscreen +mat_disable_fancy_blending 1 +cl_forcepreload 1 -limitvsconst -forcenovsync +r_dynamic 0 +mat

BENQ XL2546K settings:

FPS MODE GAMER 2
DYAC PREMIUM
Brightness 80
Contrast 80
Sharpness 10
AMA PREMIUM
Black Equalizer 5
Color Vibrance 10
Low Blue Light 0
Gamma 2
Color Temp Bluish