Our cable TV picture started dropping recently and before I called the cable company (phew!) I googled the symptoms and it was recommended to simply replace the outdated HD connection cables. My setup is pretty old (up to 4K) and I haven't found anything that looks like it will work. After reading the specs, I found that these cables are backwards compatible. Of course I swapped the cables and the picture and sound were back to normal. Now I also have a good opportunity to upgrade to 8K! Highly recommended.