Is HDMI or DisplayPort better for 240Hz?
But if you are looking into its image quality, there is technically no difference between them. Both standards are able to produce a good gaming experience, but DisplayPort 1.4 is generally superior to HDMI 2.0, HDMI 2.1 technically outperforms DP 1.4, and DisplayPort 2.0 should outperform HDMI 2.1.
Does HDMI support 240Hz at 1440p?
HDMI 2.0 can handle up to 240 Hz when using 1080p resolution, 144 Hz when using 1440p resolution, and 60 Hz when using 4K resolution.
Can HDMI 2.1 do 240Hz at 1080p?
HDMI 2.0, which is the first new-generation HDMI cable, can support 240Hz at 1080p. This is a big jump from its predecessor HDMI 1.4 that can only do 144Hz at 1080p. On the other hand, the HDMI 2.1 can do 240Hz for both 1080p and 1440p resolutions.