I just OC'd this $90 Acer 29inch 4K monitor from Japan to 75HZ using DisplayPort. I'm about to get a 200hz monitor so this is temporary. I actually managed to get it
Best Ultrawide Monitor for Gaming on Amazon 2021 | Budget 4k, 120Hz, 144Hz, Curved Ultrawide Monitor - YouTube
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Amazon.com: ASUS ROG Swift PG35VQ 35” Curved HDR Gaming Monitor 200Hz (3440 x 1440) 2ms G-SYNC Ultimate Eye Care DisplayPort HDMI USB Aura Sync HDR10 DisplayHDR 1000 : Electronics
LG 27GN950-B 27 inch UltraGear™ 4K Nano IPS 1ms G-SYNC® Compatible Gaming Monitor | LG UK
MSI Optix MAG301CR2 30 Inch Curved Gaming Monitor - 21:9 UltraWide Full HD (2560 x 1080), 1ms Response Time, 1500R, VA Panel, 200hz Refresh rate, Night Vision, AMD adaptive-Sync, Mystic Light RGB,