Hi all, i just got the acer predator xb3 which overclocks to 280hz. But my problem is that i want at least 144hz on hdmi but I only have 120hz. I have a gtx 750 (not the ti version) with the hdmi cable that came in the box. my cpu is the i5 6600k not sure if that matters. What could it be that I can't get at least 144hz?