Question: do you need a hdmi 2.0 cable for 4k?
Answer: HDMI 2.0a – HDMI 2.0a offers all previous enhancements with different types of HDR. This enhanced cable allows for richer and more vibrant color. It is noticeable compared to the HDMI 1.4 and 2.0; however, you do not need this cable in order to support 4K. It all depends on what you want the resolution to be.