In addition, you’re actually going to need 4K programming, and in most cases, you’ll need to pay for a subscription in order to receive 4K TV shows and movies. Google recommends that you need an Internet speed of no less than 20 Mbps, but in reality, you need closer to 25 Mbps for a smooth watching experience. If you’re using a soundbar or AVR, then they too will need HDCP 2.2 support and compatibility. It also needs to be capable of 60 FPS (Frames Per Second). Luckily, modern 4K UHD TVs also comes with the required USB and HDMI ports. You’re also going to need a TV that is 4K compatible. A strong and reliable Wi-Fi connection is good, but some find that an Ethernet connection is better. You will need a Chromecast Ultra and a strong Internet connection. What Is Needed to Stream 4K Ultra HD Content? Plus, if your connection keeps getting throttled because your ISP thinks you’re using your Internet too much, then that causes problems streaming 4K too. The fact is that your Chromecast Ultra will stream 4K TV, but it takes a lot out of your Internet connection in order to pull it off. Now, imagine trying to stream 4K TV alongside all these Internet problems. Plus, there are times when your Internet connection is sketchy for no darn reason. However, your Internet is being taken up by the many phones in your house, computers, laptops and tablets etc. Have you ever watched Netflix in HD, but it looks more like 420p? It’s confusing because you have a fast Wi-Fi connection in your home. If you want 4K streaming, your Internet speed should “Start” at 25mbps. If you want HD streaming, your Internet speed needs to starts at 5mbps. The second reason is because people don’t have enough Internet bandwidth. Whilst it’s true that the 2018 is a pretty sophisticated piece of kit, it doesn’t stream 4K like the 2016 Chromecast Ultra. Firstly, they buy the 2018 Chromecast thinking that the newer version must be the best. There are two reasons why people think that Chromecast won’t play 4K. Why Do Some People Say the Chromecast Will Not Stream 4K TV? Nevertheless, if you’re looking for 4K streaming on your TV, then the 2016 Chromecast Ultra is for you. It’s a simple-but-effective piece of hardware with great app support. That’s not to say that the 2018 Chromecast is in any way bad.