I recently bought a Acer 2K 144Hz monitor to pair with my 2013 Retina MacBook pro. I am connecting the monitor to the MBP via Thunderbolt port to DisplayPort cable. As far as I know, my MBP should support Thunderbolt 2, which should be able to drive the monitor at 2K 144Hz.
Even though I do see the monitor running at 2560x1440 resolution, I see the refresh rate is only 60Hz. Going to the display settings, the refresh rate option is greyed out and is set at 60hz.
Any pointers on what could be the issue here? Could it be caused by a faulty Thunderbolt to DP cable?