Well, he does what he says. I ran it from my Zotac 1050ti on my 4K monitor and it works flawlessly. just like the specs said it would. NOW I've fallen prey to several bad cables (even some on Revain) that say they're 4K compatible; in text and paragraphs he wants to promise you the world, but in the end it doesn't even work out. .well not this cable. Get one and try it yourself. I'm sure it's still a reasonable price (this is another thing that influenced my purchase. Not to say I'm cheap. I'm fine, I'm cheap)