Thank you very much for your reply.
I just checked and it appears that the cable I purchased is indeed Thunderbolt based, rather than DisplayPort based, even though it mentions being compatible with DisplayPort Alternate mode. But maybe this is not the correct specification.
As I'm getting a bit confused with all the different video output formats, is there any particular cable or adapter that ASUS recomends to ensure full compatibility?
Thank you very much in advance,