Have a laptop that I would like to connect to an external monitor. Unfortunately, the laptop only has HDMI 1.4 and therefore I wonder whether it is even possible to use it to feed my external monitor (1440p, 144Hz).
What is preventing you from searching the internet?
Have already looked, but found nothing clever about it.
No.
As far as I know, it supports a maximum of 120Hz in 1080p.
No, it won't work. At least HDMI 2.0
https://blog.notebooksbilliger.de/hdmi-displayport-co-die-video-anschluesse-am-monitor-erklaert/
It wasn't difficult…
No, with HDMI 1.4 not to 1440p.