2560x1440 @ 240Hz should be technically possible as this is a DP 1.4 cable. Throughput is described by the manufacturer as 32.4 Gbit/s and your desired specification needs 24.62 Gbit/s.

See also: https://en.m.wikipedia.org/wiki... at resolution / refresh rates limits

https://www.lindy.de/2m-Display...