Monitor automatically dimming. BENQ XL2546. I tried with and without Dynamic brightness. Set contrast and brightness to 100%, confirmed that via power settings (set to high performance) that adaptive brightness is off.
XL2546 240Hz 24.5 inch Gaming Monitor for Esports | ZOWIE France
The Best BenQ Monitor Settings used by Professional Players
BenQ Zowie XL2546 Review
BenQ ZOWIE XL2546 ESports Monitor: Press the Advantage | MMORPG.com
Best BenQ Monitor & Picture Settings for Gaming - Optimal Settings!
BenQ Zowie XL2546 Monitor Review | PC TeK REVIEWS
BenQ ZOWIE XL2546K Review - RTINGS.com
Video and Monitor Settings | Here's an in-depth look at how professionals adjust their visual settings to suit personal preference. Kings Gaming Club | By ZOWIE e-Sports | Facebook
BenQ Zowie XL2546 Review
ZOWIE XL2546K 240Hz 24.5 Inch Gaming Monitor for e-Sports | ZOWIE France