It can be difficult to tell HDMI cables apart, but it not impossible. If youre looking for an HDMI 2.1 cable , and you should be, then you want something labeled as Ultra High Speed on the cable itself. If that not there, then you might not have the speediest cable that you can have. That not the end of the world, as older cables work just fine, but you wont always be able to get the best performance with something older. What nice about the Apple TV 4K is that there a way to check if your cable...
